hefeiddd
发表于 2009-3-15 11:00
Support and ResistanceSupport and resistance represent key junctures where the forces of supply and demand meet. In the financial markets, prices are driven by excessive supply (down) and demand (up). Supply is synonymous with bearish, bears and selling. Demand is synonymous with bullish, bulls and buying. These terms are used interchangeably throughout this and other articles. As demand increases, prices advance and as supply increases, prices decline. When supply and demand are equal, prices move sideways as bulls and bears slug it out for control.
What Is Support?Support is the price level at which demand is thought to be strong enough to prevent the price from declining further. The logic dictates that as the price declines towards support and gets cheaper, buyers become more inclined to buy and sellers become less inclined to sell. By the time the price reaches the support level, it is believed that demand will overcome supply and prevent the price from falling below support.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-1amzn.png
Support does not always hold and a break below support signals that the bears have won out over the bulls. A decline below support indicates a new willingness to sell and/or a lack of incentive to buy. Support breaks and new lows signal that sellers have reduced their expectations and are willing sell at even lower prices. In addition, buyers could not be coerced into buying until prices declined below support or below the previous low. Once support is broken, another support level will have to be established at a lower level.
Where Is Support Established?Support levels are usually below the current price, but it is not uncommon for a security to trade at or near support. Technical analysis is not an exact science and it is sometimes difficult to set exact support levels. In addition, price movements can be volatile and dip below support briefly. Sometimes it does not seem logical to consider a support level broken if the price closes 1/8 below the established support level. For this reason, some traders and investors establish support zones.
What Is Resistance?Resistance is the price level at which selling is thought to be strong enough to prevent the price from rising further. The logic dictates that as the price advances towards resistance, sellers become more inclined to sell and buyers become less inclined to buy. By the time the price reaches the resistance level, it is believed that supply will overcome demand and prevent the price from rising above resistance.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-2lly.png
Resistance does not always hold and a break above resistance signals that the bulls have won out over the bears. A break above resistance shows a new willingness to buy and/or a lack of incentive to sell. Resistance breaks and new highs indicate buyers have increased their expectations and are willing to buy at even higher prices. In addition, sellers could not be coerced into selling until prices rose above resistance or above the previous high. Once resistance is broken, another resistance level will have to be established at a higher level.
Where Is Resistance Established?Resistance levels are usually above the current price, but it is not uncommon for a security to trade at or near resistance. In addition, price movements can be volatile and rise above resistance briefly. Sometimes it does not seem logical to consider a resistance level broken if the price closes 1/8 above the established resistance level. For this reason, some traders and investors establish resistance zones.
Methods to Establish Support and Resistance?Support and resistance are like mirror images and have many common characteristics.
Highs and LowsSupport can be established with the previous reaction lows. Resistance can be established by using the previous reaction highs.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-3hal.png
The above chart for Halliburton (HAL)http://stockcharts.com/images/minilink_sc.gif shows a large trading range between Dec-99 and Mar-00. Support was established with the October low around 33. In December, the stock returned to support in the mid-thirties and formed a low around 34. Finally, in February the stock again returned to the support scene and formed a low around 33 1/2.
After each bounce off support, the stock traded all the way up to resistance. Resistance was first established by the September support break at 42.5. After a support level is broken, it can turn into a resistance level. From the October lows, the stock advanced to the new support-turned-resistance level around 42.5. When the stock failed to advance past 42.5, the resistance level was confirmed. The stock subsequently traded up to 42.5 two more times after that and failed to surpass resistance both times.
Support Equals ResistanceAnother principle of technical analysis stipulates that support can turn into resistance and visa versa. Once the price breaks below a support level, the broken support level can turn into resistance. The break of support signals that the forces of supply have overcome the forces of demand. Therefore, if the price returns to this level, there is likely to be an increase in supply, and hence resistance.
The other turn of the coin is resistance turning into support. As the price advances above resistance, it signals changes in supply and demand. The breakout above resistance proves that the forces of demand have overwhelmed the forces of supply. If the price returns to this level, there is likely to be an increase in demand and support will be found.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-4ndx.png
In this example of the NASDAQ 100 Index ($NDX)http://stockcharts.com/images/minilink_sc.gif, the stock broke resistance at 935 in May-97 and traded just above this resistance level for over a month. The ability to remain above resistance established 935 as a new support level. The stock subsequently rose to 1150, but then fell back to test support at 935. After the second test of support at 935, this level is well established.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-5psft.png
From the PeopleSoft (PSFT)http://stockcharts.com/images/minilink_sc.gif example, we can see that support can turn into resistance and then back into support. PeopleSoft found support at 18 from Oct-98 to Jan-99 (green oval), but broke below support in Mar-99 as the bears overpowered the bulls. When the stock rebounded (red oval), there was still overhead supply at 18 and resistance was met from Jun-99 to Oct-99.
Where does this overhead supply come from? Demand was obviously increasing around 18 from Oct-98 to Mar-99 (green oval). Therefore, there were a lot of buyers in the stock around 18. When the price declined past 18 and to around 14, many of these buyers were probably still holding the stock. This left a supply overhang (commonly known as resistance) around 18. When the stock rebounded to 18, many of the green-oval-buyers (who bought around 18) probably took the opportunity to sell. When this supply was exhausted, the demand was able to overpower supply and advance above resistance at 18.
Trading RangeTrading ranges can play an important role in determining support and resistance as turning points or as continuation patterns. A trading range is a period of time when prices move within a relatively tight range. This signals that the forces of supply and demand are evenly balanced. When the price breaks out of the trading range, above or below, it signals that a winner has emerged. A break above is a victory for the bulls (demand) and a break below is a victory for the bears (supply).
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-6wcom.png
After an extended advance from 27 to 64, WorldCom (WCOM)http://stockcharts.com/images/minilink_sc.gif entered into a trading range between 55 and 63 for about 5 months. There was a false breakout in mid-June when the stock briefly poked its head above 62 (red oval). This did not last long and a gap down a few days later nullified the breakout (black arrow). The stock then proceeded to break support at 55 in Aug-99 and trade as low as 50. Here is another example of support turned resistance as the stock bounced off 55 two more times before heading lower. While this does not always happen, a return to the new resistance level offers a second chance for longs to get out and shorts to enter the fray.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-7lu.png
In Nov/Dec-99, Lucent Technologies (LU)http://stockcharts.com/images/minilink_sc.gif formed a trading range that resembled a head and shoulders pattern (red oval). When the stock broke support at 60, there was little or no time to exit. Even though the there is a long black candlestick indicating an open at 59, the stock fell so fast that it was impossible to exit above 44. In hindsight, the support line could have been drawn as an upward sloping neckline (blue line), and the support break would have come at 61. This is only 1 point higher and a trader would have had to take action immediately to avoid a sharp fall. However, the lows match up rather nicely on the neckline, and it is something to consider when drawing support lines.
After Lucent declined, a trading range was established between 40.5 and 47.5 for almost two months (green oval). The resistance level of the trading range was well marked by three reaction peaks at 47.5. The support level was not as clearly marked, but appeared to be between 40 and 41. Some buying interest began to become evident around 44 in mid- to late-February. Notice the array of candlesticks with long lower shadows, or hammers, as they are known. The stock then proceeded to form two up gaps on 24-Feb and 25-Feb, and finally closed above resistance at 48. This was a clear indication of demand winning out over supply. There were still two more opportunities (days) to get in on the action. On the third day after the breakout, the stock gapped up and moved above 56.
Support and Resistance ZonesBecause technical analysis is not an exact science, it is useful to create support and resistance zones. This is contrary to the strategy mapped out for Lucent Technologies (LU), but it is sometimes the case. Each security has its own characteristics, and analysis should reflect the intricacies of the security. Sometimes, exact support and resistance levels are best, and, sometimes, zones work better. Generally, the tighter the range, the more exact the level. If the trading range spans less than 2 months and the price range is relatively tight, then more exact support and resistance levels are best suited. If a trading range spans many months and the price range is relatively large, then it is best to use support and resistance zones. These are only meant as general guidelines, and each trading range should be judged on its own merits.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/support_and_resistance/suppresis-8hal.png
Returning to the analysis of Halliburton (HAL)http://stockcharts.com/images/minilink_sc.gif, we can see that the November high of the trading range (33 to 44) extended more than 20% past the low, making the range quite large relative to the price. Because the September support break forms our first resistance level, we are ready to set up a resistance zone after the November high is formed, probably around early December. At this point though, we are still unsure if a large trading range will develop. The subsequent low in December, which was just higher than the October low, offers evidence that a trading range is forming, and we are ready to set the support zone. As long as the stock trades within the boundaries set by the support and resistance zone, we will consider the trading range to be valid. Support may be looked upon as an opportunity to buy, and resistance as an opportunity to sell.
ConclusionIdentification of key support and resistance levels is an essential ingredient to successful technical analysis. Even though it is sometimes difficult to establish exact support and resistance levels, being aware of their existence and location can greatly enhance analysis and forecasting abilities. If a security is approaching an important support level, it can serve as an alert to be extra vigilant in looking for signs of increased buying pressure and a potential reversal. If a security is approaching a resistance level, it can act as an alert to look for signs of increased selling pressure and potential reversal. If a support or resistance level is broken, it signals that the relationship between supply and demand has changed. A resistance breakout signals that demand (bulls) has gained the upper hand and a support break signals that supply (bears) has won the battle.
hefeiddd
发表于 2009-3-15 11:00
Trend LinesTechnical analysis is built on the assumption that prices trend. Trend Lines are an important tool in technical analysis for both trend identification and confirmation. A trend line is a straight line that connects two or more price points and then extends into the future to act as a line of support or resistance. Many of the principles applicable to support and resistance levels can be applied to trend lines as well. It is important that you understand all of the concepts presented in our Support and Resistance article before you continue.
Definitionhttp://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-1emc.png
Uptrend LineAn uptrend line has a positive slope and is formed by connecting two or more low points. The second low must be higher than the first for the line to have a positive slope. Uptrend lines act as support and indicate that net-demand (demand less supply) is increasing even as the price rises. A rising price combined with increasing demand is very bullish, and shows a strong determination on the part of the buyers. As long as prices remain above the trend line, the uptrend is considered solid and intact. A break below the uptrend line indicates that net-demand has weakened and a change in trend could be imminent.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-2amzn.png
Downtrend LineA downtrend line has a negative slope and is formed by connecting two or more high points. The second high must be lower than the first for the line to have a negative slope. Downtrend lines act as resistance, and indicate that net-supply (supply less demand) is increasing even as the price declines. A declining price combined with increasing supply is very bearish, and shows the strong resolve of the sellers. As long as prices remain below the downtrend line, the downtrend is solid and intact. A break above the downtrend line indicates that net-supply is decreasing and that a change of trend could be imminent.
For a detailed explanation of trend changes, which are different than just trend line breaks, please see our article on the Dow Theory.
Scale SettingsHigh points and low points appear to line up better for trend lines when prices are displayed using a semi-log scale. This is especially true when long-term trend lines are being drawn or when there is a large change in price. Most charting programs allow users to set the scale as arithmetic or semi-log. An arithmetic scale displays incremental values (5,10,15,20,25,30) evenly as they move up the y-axis. A $10 movement in price will look the same from $10 to $20 or from $100 to $110. A semi-log scale displays incremental values in percentage terms as they move up the y-axis. A move from $10 to $20 is a 100% gain, and would appear to be a much larger than a move from $100 to $110, which is only a 10% gain.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-3emc.png
In the case of EMChttp://stockcharts.com/images/minilink_sc.gif, there was a large price change over a long period of time. While there were not any false breaks below the uptrend line on the arithmetic scale, the rate of ascent appears smoother on the semi-log scale. EMC doubled three times in less than two years. On the semi-log scale, the trend line fits all the way up. On the arithmetic scale, three different trend lines were required to keep pace with the advance.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-4amzn.png
In the case of Amazon.com (AMZN)http://stockcharts.com/images/minilink_sc.gif, there were two false breaks above the downtrend line as the stock declined during 2000 and 2001. These false break outs could have led to premature buying as the stock continued to decline after each one. The stock lost 60% of its value three times over a two year period. The semi-log scale reflects the percentage loss evenly, and the downtrend line was never broken.
ValidationIt takes two or more points to draw a trend line The more points used to draw the trend line, the more validity attached to the support or resistance level represented by the trend line. It can sometimes be difficult to find more than 2 points from which to construct a trend line Even though trend lines are an important aspect of technical analysis, it is not always possible to draw trend lines on every price chart. Sometimes the lows or highs just don't match up, and it is best not to force the issue. The general rule in technical analysis is that it takes two points to draw a trend line and the third point confirms the validity.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-5msft.png
The chart of Microsoft (MSFT)http://stockcharts.com/images/minilink_sc.gif shows an uptrend line that has been touched 4 times. After the third touch in Nov-99, the trend line was considered a valid line of support. Now that the stock has bounced off of this level a fourth time, the soundness of the support level is enhanced even more. As long as the stock remains above the trend line (support), the trend will remain in control of the bulls. A break below would signal that net-supply was increasing and that a change in trend could be imminent.
Spacing of PointsThe lows used to form an uptrend line and the highs used to form a downtrend line should not be too far apart, or too close together. The most suitable distance apart will depend on the time frame, the degree of price movement, and personal preferences. If the lows (highs) are too close together, the validity of the reaction low (high) may be in question. If the lows are too far apart, the relationship between the two points could be suspect. An ideal trend line is made up of relatively evenly spaced lows (or highs). The trend line in the above MSFT example represents well-spaced low points.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-6wmt.png
On the Wal-Mart (WMT)http://stockcharts.com/images/minilink_sc.gif example, the second high point appears to be too close to the first high point for a valid trend line; however, it would be feasible to draw a trend line beginning at point 2 and extending down to the February reaction high.
AnglesAs the steepness of a trend line increases, the validity of the support or resistance level decreases. A steep trend line results from a sharp advance (or decline) over a brief period of time. The angle of a trend line created from such sharp moves is unlikely to offer a meaningful support or resistance level. Even if the trend line is formed with three seemingly valid points, attempting to play a trend line break or to use the support and resistance level established it will often prove difficult.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-7yhoo.png
The trend line for Yahoo! (YHOO)http://stockcharts.com/images/minilink_sc.gif was touched four times over a 5-month period. The spacing between the points appears OK, but the steepness of the trend line is unsustainable, and the price is more likely than not to drop below the trend line. However, trying to time this drop or make a play after the trend line is broken is a difficult task. The amount of data displayed and the size of the chart can also affect the angle of a trend line. Short and wide charts are less likely to have steep trend lines than long and narrow charts. Keep that in mind when assessing the validity and sustainability of a trend line.
Internal Trend LinesSometimes there appears to be the possibility for drawing a trend line, but the exact points do not match up cleanly. The highs or lows might be out of whack, the angle might be too steep or the points might be too close together. If one or two points could be ignored, then a fitted trend line could be formed. With the volatility present in the market, prices can over-react, and produce spikes that distort the highs and lows. One method for dealing with over-reactions is to draw internal trend lines. Even though an internal trend line ignores price spikes, the ignoring should be within reason.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-8spx.png
The long-term trend line for the S&P 500 ($SPX)http://stockcharts.com/images/minilink_sc.gif extends up from the end of 1994, and passes through low points in Jul-96, Sept-98 and Oct-98. These lows were formed with selling climaxes, and represented extreme price movements that protrude beneath the trend line. By drawing the trend line through the lows, the line appears to be at a reasonable angle, and the other lows match up extremely well.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-9ko.png
Sometimes, there is a price cluster with a high or low spike sticking out. A price cluster is an area where prices are grouped within a tight range over a period of time. The price cluster can be used to draw the trend line, and the spike can be ignored. The Coca Cola (KO)http://stockcharts.com/images/minilink_sc.gif chart shows an internal trend line that is formed by ignoring price spikes and using the price clusters, instead. In October and November 1998, Coke formed a peak, with the November peak just higher than the October peak (1). If the November peak had been used to draw a trend line, then the slope would have been more negative, and there would have appeared to be a breakout in Dec-98 (gray line). However, this would have only been a two-point trend line, because the May-June highs are too close together (black arrows). Once the Dec-99 peak formed (green arrow), it would have been possible to draw an internal trend line based on the price clusters around the Oct/Nov-98 and the Dec-99 peaks (blue line). This trend line is based on three solid touches, and it accurately forecasts resistance in Jan-00 (blue arrow).
ConclusionTrend lines can offer great insight, but if used improperly, they can also produce false signals. Other items - such as horizontal support and resistance levels or peak-and-trough analysis - should be employed to validate trend line breaks. While trend lines have become a very popular aspect of technical analysis, they are merely one tool for establishing, analyzing, and confirming a trend. Trend lines should not be the final arbiter, but should serve merely as a warning that a change in trend may be imminent. By using trend line breaks for warnings, investors and traders can pay closer attention to other confirming signals for a potential change in trend.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/trend_lines/trendlines-10vrsn.png
The uptrend line for VeriSign (VRSN)http://stockcharts.com/images/minilink_sc.gif was touched 4 times, and seemed to be a valid support level. Even though the trend line was broken in Jan-00, the previous reaction low held, and did not confirm the trend line break. In addition, the stock recorded a new higher high prior to the trend line break.
hefeiddd
发表于 2009-3-15 11:02
Introduction to Chart PatternsAdvertisement
There are hundreds of thousands of market participants buying and selling securities for a wide variety of reasons: hope of gain, fear of loss, tax consequences, short-covering, hedging, stop-loss triggers, price target triggers, fundamental analysis, technical analysis, broker recommendations and a few dozen more. Trying to figure out why participants are buying and selling can be a daunting process. Chart Patterns put all buying and selling into perspective by consolidating the forces of supply and demand into a concise picture. As a complete pictorial record of all trading, chart patterns provide a framework to analyze the battle raging between bulls and bears. More importantly, chart patterns and technical analysis can help determine who is winning the battle, allowing traders and investors to position themselves accordingly.
In many waves, Chart patterns are simply more complex versions of trend lines. It is important that you read and understand our articles on Support and Resistance as well as Trend Lines before you continue.
Chart pattern analysis can be used to make short-term or long-term forecasts. The data can be intraday, daily, weekly or monthly and the patterns can be as short as one day or as long as many years. Gaps and outside reversals may form in one trading session, while broadening tops and dormant bottoms may require many months to form.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/introduction_to_chart_patterns/patterns-1amzn.png
Amazon (AMZN)http://stockcharts.com/images/minilink_sc.gif
http://stockcharts.com/school/data/media/chart_school/chart_analysis/introduction_to_chart_patterns/patterns-2cien.png
CIENA (CIEN)http://stockcharts.com/images/minilink_sc.gif
An Oldie but GoodieMuch of our understanding of chart patterns can be attributed to the work of Richard Schabacker. His 1932 classic, Technical Analysis and Stock Market Profits, laid the foundations for modern pattern analysis. In Technical Analysis of Stock Trends (1948), Edwards and Magee credit Schabacker for most of the concepts put forth in the first part of their book. We would also like to acknowledge Messrs. Schabacker, Edwards and Magee, and John Murphy as the driving forces behind these articles and our understanding of chart patterns.
Pattern analysis may seem straightforward, but it is by no means an easy task. Schabacker states:
The science of chart reading, however, is not as easy as the mere memorizing of certain patterns and pictures and recalling what they generally forecast. Any general stock chart is a combination of countless different patterns and its accurate analysis depends upon constant study, long experience and knowledge of all the fine points, both technical and fundamental, and, above all, the ability to weigh opposing indications against each other, to appraise the entire picture in the light of its most minute and composite details as well as in the recognition of any certain and memorized formula.
Even though Schabacker refers to "the science of chart reading", technical analysis can at times be less science and more art. In addition, pattern recognition can be open to interpretation, which can be subject to personal biases. To defend against biases and confirm pattern interpretations, other aspects of technical analysis should be employed to verify or refute the conclusions drawn. While many patterns may seem similar in nature, no two patterns are exactly alike. False breakouts, bogus reads and exceptions to the rule are all part of the ongoing education.
Careful and constant study are required for successful chart analysis. On the AMZN chart above, the stock broke resistance from a head and shoulders reversal. While the trend is now bearish, analysis must continue to confirm the bearish trend.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/introduction_to_chart_patterns/patterns-3nvls.png
Novellus (NVLS)http://stockcharts.com/images/minilink_sc.gif
Some analysts might have labeled the NVLS chart as a head and shoulders patterns with neckline support around 17.50. Whether or not this is robust remains open to debate. Even though the stock broke neckline support at 17.50, it repeatedly moved back above its support break. This refusal might have been taken as a sign of strength and justify a reassessment of the pattern.
Two Dominant GroupsTwo basic tenets of technical analysis are that prices trend and that history repeats itself. An uptrend indicates that the forces of demand (bulls) are in control and a downtrend that the forces of supply (bears) are in control. However, prices do not trend forever and as the balance of power shifts, a chart pattern begins to emerge. Certain patterns, such as a parallel channel, denote a strong trend. However, the vast majority of chart patterns fall into two main groups: reversal and continuation. Reversal patterns indicate a change of trend and can be broken down into top and bottom formations. Continuation patterns indicate a pause in trend and indicate that the previous direction will resume after a period of time.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/introduction_to_chart_patterns/patterns-4msft.png
Microsoft (MSFT)http://stockcharts.com/images/minilink_sc.gif
Just because a pattern forms after a significant advance or decline does not mean it is a reversal pattern. Many patterns, such as a rectangle, can be classified as either reversal or continuation. Much depends on the previous price action, volume and other indicators as the pattern evolves. This is where the science of technical analysis becomes the art of technical analysis.
For detailed explanations of specific chart patterns, see the Chart Analysis page in the Chart School.
hefeiddd
发表于 2009-3-15 11:02
Double Top (Reversal)The double top is a major reversal pattern that forms after an extended uptrend. As its name implies, the pattern is made up of two consecutive peaks that are roughly equal, with a moderate trough in-between.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/double_top_reversal/doubletop-g.png
Although there can be variations, the classic double top marks at least an intermediate change, if not long-term change, in trend from bullish to bearish. Many potential double tops can form along the way up, but until key support is broken, a reversal cannot be confirmed. To help clarify, we will look at the key points in the formation and then walk through an example.
Prior Trend: With any reversal pattern, there must be an existing trend to reverse. In the case of the double top, a significant uptrend of several months should be in place.
First Peak: The first peak should mark the highest point of the current trend. As such, the first peak is fairly normal and the uptrend is not in jeopardy (or in question) at this time.
Trough: After the first peak, a decline takes place that typically ranges from 10 to 20%. Volume on the decline from the first peak is usually inconsequential. The lows are sometimes rounded or drawn out a bit, which can be a sign of tepid demand.
Second Peak: The advance off the lows usually occurs with low volume and meets resistance from the previous high. Resistance from the previous high should be expected. Even after meeting resistance, only the possibility of a double top exists. The pattern still needs to be confirmed. The time period between peaks can vary from a few weeks to many months, with the norm being 1-3 months. While exact peaks are preferable, there is some leeway. Usually a peak within 3% of the previous high is adequate.
Decline from Peak: The subsequent decline from the second peak should witness an expansion in volume and/or an accelerated descent, perhaps marked with a gap or two. Such a decline shows that the forces of demand are weaker than supply and a support test is imminent.
Support Break: Even after trading down to support, the double top and trend reversal are still not complete. Breaking support from the lowest point between the peaks completes the double top. This too should occur with an increase in volume and/or an accelerated descent.
Support Turned Resistance: Broken support becomes potential resistance and there is sometimes a test of this newfound resistance level with a reaction rally. Such a test can offer a second chance to exit a position or initiate a short.
[*]Price Target: The distance from support break to peak can be subtracted from the support break for a price target. This would infer that the bigger the formation is, the larger the potential decline.
While the double top formation may seem straightforward, technicians should take proper steps to avoid deceptive double tops. The peaks should be separated by about a month. If the peaks are too close, they could just represent normal resistance rather than a lasting change in the supply/demand picture. Ensure that the low between the peaks declines at least 10%. Declines less than 10% may not be indicative of a significant increase in selling pressure. After the decline, analyze the trough for clues on the strength of demand. If the trough drags on a bit and has trouble moving back up, demand could be drying up. When the security does advance, look for a contraction in volume as a further indication of weakening demand.
Perhaps the most important aspect of a double top is to avoid jumping the gun. Wait for support to be broken in a convincing manner, and usually with an expansion of volume. A price or time filter can be applied to differentiate between valid and false support breaks. A price filter might require a 3% support break before validation. A time filter might require the support break to hold for 3 days before considering it valid. The trend is in force until proven otherwise. This applies to the double top as well. Until support is broken in a convincing manner, the trend remains up.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/double_top_reversal/doubletop-f.png
The double top in Ford took about 5 months to form. Even after the support break, there was another test of newfound resistance almost 4 months later.
From a low near 10 in Mar-97, Ford advanced to 36 by Dec-98. The trend line extending up from Mar-97 is an internal trend line and Ford held above it until the break in May-99.
From the first peak, the stock declined around 15% to form the trough.
After reaching a low near 30 1/2 in early February, the trough formed over the next 2 months, and there wasn't a rally until early April. This long-drawn-out low suggested tepid demand.
The decline from 36.80 occurred with two gaps down and increased volume. Furthermore, Chaikin Money Flow promptly moved below -10%. The speed with which money flows deteriorated indicated a serious increase in selling pressure.
In late May and early June, the stock traded for about 3 weeks at support from the previous low. During this time, money flows declined below -20%. Even though the situation looked ominous, the double formation would not be complete until support was broken.
[*]Support was broken in early June when the stock fell below 28 1/2, which was more than 3% below support at 30 1/2. After this sharp drop, there was an equally sharp advance back above the newfound resistance level. While a test of broken support can be expected, it is usually not quite this early. The advance to 32 in late June may have triggered some unpleasant short covering for those who jumped in on the first support break. The stock fell to 25, and then began the retracement advance that would ultimately test support.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/double_top_reversal/doubletop-f2.png
On the second chart, 30 3/4 marked the support turned resistance level, and 31 marked a 50% retracement of the decline from 36.80 to 25. Combined with the price action in early June and early July, a resistance zone could probably be established between 31 and 32. The stock subsequently formed a lower high at 30 in Jan-00, and declined to around 22 by mid-March.
hefeiddd
发表于 2009-3-15 11:04
Double Bottom (Reversal)The double bottom is a major reversal pattern that forms after an extended downtrend. As its name implies, the pattern is made up of two consecutive troughs that are roughly equal, with a moderate peak in-between.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/double_bottom_reversal/doublebot-utx.png
Although there can be variations, the classic double bottom usually marks an intermediate or long-term change in trend. Many potential double bottoms can form along the way down, but until key resistance is broken, a reversal cannot be confirmed. To help clarify, we will look at the key points in the formation and then walk through an example.
Prior Trend: With any reversal pattern, there must be an existing trend to reverse. In the case of the double bottom, a significant downtrend of several months should be in place.
First Trough: The first trough should mark the lowest point of the current trend. As such, the first trough is fairly normal in appearance and the downtrend remains firmly in place.
Peak: After the first trough, an advance takes place that typically ranges from 10 to 20%. Volume on the advance from the first trough is usually inconsequential, but an increase could signal early accumulation. The high of the peak is sometimes rounded or drawn out a bit from the hesitation to go back down. This hesitation indicates that demand is increasing, but still not strong enough for a breakout.
Second Trough: The decline off the reaction high usually occurs with low volume and meets support from the previous low. Support from the previous low should be expected. Even after establishing support, only the possibility of a double bottom exists, it still needs to be confirmed. The time period between troughs can vary from a few weeks to many months, with the norm being 1-3 months. While exact troughs are preferable, there is some room to maneuver and usually a trough within 3% of the previous is considered valid.
Advance from Trough: Volume is more important for the double bottom than the double top. There should clear evidence that volume and buying pressure are accelerating during the advance off of the second trough. An accelerated ascent, perhaps marked with a gap or two, also indicates a potential change in sentiment.
Resistance Break: Even after trading up to resistance, the double top and trend reversal are still not complete. Breaking resistance from the highest point between the troughs completes the double bottom. This too should occur with an increase in volume and/or an accelerated ascent.
Resistance Turned Support: Broken resistance becomes potential support and there is sometimes a test of this newfound support level with the first correction. Such a test can offer a second chance to close a short position or initiate a long.
[*]Price Target: The distance from the resistance breakout to trough lows can be added on top of the resistance break to estimate a target. This would imply that the bigger the formation is, the larger the potential advance.
It is important to remember that the double bottom is an intermediate to long-term reversal pattern that will not form in a few days. Even though formation in a few weeks is possible, it is preferable to have at least 4 weeks between lows. Bottoms usually take longer than tops to form and patience can often be a virtue. Give the pattern time to develop and look for the proper clues. The advance off of the first trough should be 10-20%. The second trough should form a low within 3% of the previous low and volume on the ensuing advance should increase. Volume indicators such as Chaikin Money Flow, OBV and Accumulation/Distribution can be used to look for signs of buying pressure. Just as with the double top, it is paramount to wait for the resistance breakout. The formation is not complete until the previous reaction high is taken out.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/double_bottom_reversal/doublebot-pfe.png
After trending lower for almost a year, PFE formed a double bottom and broke resistance with an expansion in volume.
From a high near 50 in April-99, PFE declined to 30 in November-99, which was a new 52-week low.
The stock advanced over 20% off of its low and formed a reaction high around 37 1/2. Volume expanded and the 13-Jan advance (green arrow) occurred on the highest volume since 5-Nov.
After a short pullback, there was another attempt to break above resistance, but this failed. Even so, volume on advancing days was generally higher than on declining days. The ability of the stock to remain in the mid-thirties for an extended period of time indicated some strengthening in demand.
The decline from 37 1/2 back to 30 was sharp, but downside volume did not expand materially. There were two days when volume on a decline exceeded the 60-day SMA and Chaikin Money Flow dipped near -10% twice. However, money flows indicated accumulation throughout the decline by remaining mostly above zero with periodic movements above +10%.
The second trough formed with a low exactly equal to the previous low (30) and a little over 2 months separated the lows.
The advance off of the second low witnessed an accelerated move with an expansion of volume. After the second low at 30, 5 of the next 6 advancing days saw volume well above the 60-day SMA. Chaikin Money Flow, which never really weakened, moved above +20% within 6 days of the low.
[*]Resistance at 37 1/2 was broken with a gap up on the open and another volume expansion. After running from 30 to 40 in a few weeks, the stock pulled back to the resistance break at 37 1/2, which now turned into support. There was a brief chance to get in on the pullback and the stock quickly advanced past 45.
hefeiddd
发表于 2009-3-15 11:05
Head and Shoulders Top (Reversal)A Head and Shoulders reversal pattern forms after an uptrend, and its completion marks a trend reversal. The pattern contains three successive peaks with the middle peak (head) being the highest and the two outside peaks (shoulders) being low and roughly equal. The reaction lows of each peak can be connected to form support, or a neckline.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/head_and_shoulders_top_reversal/hs-basicflat-cnet.png
As its name implies, the Head and Shoulders reversal pattern is made up of a left shoulder, a head, a right shoulder, and a neckline. Other parts playing a role in the pattern are volume, the breakout, price target and support turned resistance. We will look at each part individually, and then put them together with some examples.
Prior Trend: It is important to establish the existence of a prior uptrend for this to be a reversal pattern. Without a prior uptrend to reverse, there cannot be a Head and Shoulders reversal pattern (or any reversal pattern for that matter).
Left Shoulder: While in an uptrend, the left shoulder forms a peak that marks the high point of the current trend. After making this peak, a decline ensues to complete the formation of the shoulder (1). The low of the decline usually remains above the trend line, keeping the uptrend intact.
Head: From the low of the left shoulder, an advance begins that exceeds the previous high and marks the top of the head. After peaking, the low of the subsequent decline marks the second point of the neckline (2). The low of the decline usually breaks the uptrend line, putting the uptrend in jeopardy.
Right Shoulder: The advance from the low of the head forms the right shoulder. This peak is lower than the head (a lower high) and usually in line with the high of the left shoulder. While symmetry is preferred, sometimes the shoulders can be out of whack. The decline from the peak of the right shoulder should break the neckline.
Neckline: The neckline forms by connecting low points 1 and 2. Low point 1 marks the end of the left shoulder and the beginning of the head. Low point 2 marks the end of the head and the beginning of the right shoulder. Depending on the relationship between the two low points, the neckline can slope up, slope down or be horizontal. The slope of the neckline will affect the pattern's degree of bearishness: a downward slope is more bearish than an upward slope. Sometimes more than one low point can be used to form the neckline.
Volume: As the Head and Shoulders pattern unfolds, volume plays an important role in confirmation. Volume can be measured as an indicator (OBV, Chaikin Money Flow) or simply by analyzing volume levels. Ideally, but not always, volume during the advance of the left shoulder should be higher than during the advance of the head. This decrease in volume and the new high of the head, together, serve as a warning sign. The next warning sign comes when volume increases on the decline from the peak of the head. Final confirmation comes when volume further increases during the decline of the right shoulder.
Neckline Break: The head and shoulders pattern is not complete and the uptrend is not reversed until neckline support is broken. Ideally, this should also occur in a convincing manner, with an expansion in volume.
Support Turned Resistance: Once support is broken, it is common for this same support level to turn into resistance. Sometimes, but certainly not always, the price will return to the support break, and offer a second chance to sell.
[*]Price Target: After breaking neckline support, the projected price decline is found by measuring the distance from the neckline to the top of the head. This distance is then subtracted from the neckline to reach a price target. Any price target should serve as a rough guide, and other factors should be considered as well. These factors might include previous support levels, Fibonacci retracements, or long-term moving averages.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/head_and_shoulders_top_reversal/hs-basicupslope-adm.png
Archer Daniels Midland Company (ADM)http://stockcharts.com/images/minilink_sc.gif formed a Head and Shoulders reversal with a slightly upward sloping neckline. Key points include:
The low at 17 1/2 marked the end of the left shoulder and the beginning of the head (1).
During the advance to 20 1/2, volume was still high, but not as high as during the left shoulder advance. However, during the next advance to 20, volume tapered off significantly.
Volume continued to decline until the breaking of the neckline. (Note red line on volume bars.)
The decline from 20 1/2 to 17 1/2 formed the second low point (2).
During the decline of the right shoulder and neckline break, volume expanded (red oval), and Chaikin Money Flow turned negative.
After the initial decline, there was a return to the neckline break (black arrow). Even during this decline, Chaikin Money Flow remained negative. The subsequent decline took the stock below 11.
[*]The measurement from neckline to the top of the head was 3. With the neckline break at 17 1/2, this would imply a move to around 14 1/2. The July '98 low was 13 1/2. After a decline from 20 1/2, at least, a short reaction rally could have been expected.
The head and shoulders pattern is one of the most common reversal formations. It is important to remember that it occurs after an uptrend and usually marks a major trend reversal when complete. While it is preferable that the left and right shoulders be symmetrical, it is not an absolute requirement. They can be different widths as well as different heights. Identification of neckline support and volume confirmation on the break can be the most critical factors. The support break indicates a new willingness to sell at lower prices. Lower prices combined with an increase in volume indicate an increase in supply. The combination can be lethal, and sometimes, there is no second chance return to the support break. Measuring the expected length of the decline after the breakout can be helpful, but don't count on it for your ultimate target. As the pattern unfolds over time, other aspects of the technical picture are likely to take precedence.
hefeiddd
发表于 2009-3-15 11:05
Head and Shoulders Bottom (Reversal)The Head and Shoulders bottom is referred to sometimes as an Inverse Head and Shoulders. The pattern shares many common characteristics with its comparable partner, but relies more heavily on volume patterns for confirmation.
As a major reversal pattern, the Head and Shoulders Bottom forms after a downtrend, and its completion marks a change in trend. The pattern contains three successive troughs with the middle trough (head) being the deepest and the two outside troughs (shoulders) being shallower. Ideally, the two shoulders would be equal in height and width. The reaction highs in the middle of the pattern can be connected to form resistance, or a neckline.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/head_and_shoulders_bottom_reversal/hs-botslopup-frx.png
The price action forming both Head and Shoulders Top and Head and Shoulders Bottom patterns remains roughly the same, but reversed. The role of volume marks the biggest difference between the two. Generally speaking, volume plays a larger role in bottom formations than top formations. While an increase in volume on the neckline breakout for a Head and Shoulders Top is welcomed, it is absolutely required for a bottom. We will look at each part of the pattern individually, keeping volume in mind, and then put the parts together with some examples.
Prior Trend: It is important to establish the existence of a prior downtrend for this to be a reversal pattern. Without a prior downtrend to reverse, there cannot be a Head and Shoulders Bottom formation.
Left Shoulder: While in a downtrend, the left shoulder forms a trough that marks a new reaction low in the current trend. After forming this trough, an advance ensues to complete the formation of the left shoulder (1). The high of the decline usually remains below any longer trend line, thus keeping the downtrend intact.
Head: From the high of the left shoulder, a decline begins that exceeds the previous low and forms the low point of the head. After making a bottom, the high of the subsequent advance forms the second point of the neckline (2). The high of the advance sometimes breaks a downtrend line, which calls into question the robustness of the downtrend.
Right Shoulder: The decline from the high of the head (neckline) begins to form the right shoulder. This low is always higher than the head, and it is usually in line with the low of the left shoulder. While symmetry is preferred, sometimes the shoulders can be out of whack, and the right shoulder will be higher, lower, wider, or narrower. When the advance from the low of the right shoulder breaks the neckline, the Head and Shoulders Bottom reversal is complete.
Neckline: The neckline forms by connecting reaction highs 1 and 2. Reaction High 1 marks the end of the left shoulder and the beginning of the head. Reaction High 2 marks the end of the head and the beginning of the right shoulder. Depending on the relationship between the two reaction highs, the neckline can slope up, slope down, or be horizontal. The slope of the neckline will affect the pattern's degree of bullishness: an upward slope is more bullish than downward slope.
Volume: While volume plays an important role in the Head and Shoulders Top, it plays a crucial role in the Head and Shoulders Bottom. Without the proper expansion of volume, the validity of any breakout becomes suspect. Volume can be measured as an indicator (OBV, Chaikin Money Flow) or simply by analyzing the absolute levels associated with each peak and trough.
Volume levels during the first half of the pattern are less important than in the second half. Volume on the decline of the left shoulder is usually pretty heavy and selling pressure quite intense. The intensity of selling can even continue during the decline that forms the low of the head. After this low, subsequent volume patterns should be watched carefully to look for expansion during the advances.
[*]The advance from the low of the head should show an increase in volume and/or better indicator readings, e.g., CMF > 0 or rise in OBV. After the reaction high forms the second neckline point, the right shoulder's decline should be accompanied with light volume. It is normal to experience profit-taking after an advance. Volume analysis helps distinguish between normal profit-taking and heavy selling pressure. With light volume on the pullback, indicators like CMF and OBV should remain strong. The most important moment for volume occurs on the advance from the low of the right shoulder. For a breakout to be considered valid, there needs to be an expansion of volume on the advance and during the breakout.
Neckline Break: The Head and Shoulders Bottom pattern is not complete, and the downtrend is not reversed until neckline resistance is broken. For a Head and Shoulders Botom, this must occur in a convincing manner, with an expansion of volume.
Resistance Turned Support: Once resistance is broken, it is common for this same resistance level to turn into support. Often, the price will return to the resistance break, and offer a second chance to buy.
[*]Price Target: After breaking neckline resistance, the projected advance is found by measuring the distance from the neckline to the bottom of the head. This distance is then added to the neckline to reach a price target. Any price target should serve as a rough guide, and other factors should be considered, as well. These factors might include previous resistance levels, Fibonacci retracements or long-term moving averages.
Alaska Air Group, Inc. (ALK) formed a head and shoulders bottom with a downward sloping neckline.Key points include:
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/head_and_shoulders_bottom_reversal/hs-botslopedn-alk.png
The stock began a downtrend in early July, and declined from 60 to 26.
The low of the left shoulder formed with a large spike in volume on a sharp down day (red arrows).
The reaction rally at around 42 1/2 formed the first point of the neckline (1). Volume on the advance was respectable with many gray bars exceeding the 60-day SMA. (Note: gray bars denote advancing days, black bars declining days and the thin red horizontal is the 60-day SMA).
The decline from 42 1/2 to 26 (head) was quite dramatic, but volume did not get out of hand. Chaikin Money Flow was mostly positive when the lows around 26 were forming.
The advance off of the low saw a large expansion of volume (green oval) and gap up. The strength behind the move indicated that a significant low formed.
After the reaction high around 39, the second point of the neckline could be drawn (2).
The decline from 39 to 33 occurred on light volume until the final two days, when volume reached its highest point in a month. Even though there are two long black (down) volume bars, these are surrounded by above-average gray (up) volume bars. Also notice how trend line resistance near 35 became support around 33 on the price chart.
The advance off of the low of the right shoulder occurred with above average volume. Chaikin Money Flow was at its highest levels, and surpassed +20% shortly after neckline resistance was broken.
[*]After breaking neckline resistance, the stock returned to this newfound support with a successful test around 35 (green arrow).
AT&T (T) formed a head and shoulders bottom with a flat neckline. The shoulders are a bit shallow, but the neckline and head are well pronounced. Key points include:
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/head_and_shoulders_bottom_reversal/hs-botslopeflat-t.png
The stock established a 6-month downtrend with the trend line extending down from Mar-98.
After a head fake above the trend line in late June, the stock fell from 66 to 50 with a sharp increase in volume to form the left shoulder.
The rally to 61 met resistance from the trend line, and the reaction high became the first point of the neckline.
The decline from 61 to 48 finished with a piercing pattern to form the low of the head. Even though volume was heavy when the long black candlestick formed, the subsequent reversal occurred on even higher volume. This reversal was followed with a number of strong advances and up gaps. Also notice that Chaikin Money Flow was above +10% when the low of the head formed.
The advance from the low of the head broke above the trend line, extending down from Mar-98, and met resistance around 61. This reaction high formed the second point of the neckline.
The right shoulder was quite short and shallow. The low was recorded at 57 and Chaikin Money Flow remained above +10% the whole time. Support was found from the trend line that offered resistance a few weeks earlier.
The stock advanced sharply off of lows that formed the right shoulder, and volume increased three straight days (blue arrow). This is a bit early, but volume remained just above average for the neckline breakout a few days later. Also Chaikin Money Flow remained above +10% the whole time.
[*]After the break of neckline resistance, the stock tested this newfound support twice while consolidating recent gains. The power arrived a few weeks later with a strong move off support and a huge increase in volume. The stock subsequently advanced from the low sixties to the low eighties.
Head and Shoulder Bottoms are one of the most common and reliable reversal formations. It is important to remember that they occur after a downtrend and usually mark a major trend reversal when complete. While it is preferable that the left and right shoulders be symmetrical, it is not an absolute requirement. Shoulders can be different widths as well as different heights. Keep in mind that technical analysis is more an art than a science. If you are looking for the perfect pattern, it may be a long time coming.
Analysis of the Head and Shoulders Bottom should focus on correct identification of neckline resistance and volume patterns. These are two of the most important aspects to a successful read, and by extension a successful trade. The neckline resistance breakout combined with an increase in volume indicates an increase in demand at higher prices. Buyers are exerting greater force, and the price is being affected.
As seen from the examples, traders do not always have to chase a stock after the neckline breakout. Often, but certainly not always, the price will return to this new support level and offer a second chance to buy. Measuring the expected length of the advance after the breakout can be helpful, but don't count on it for your ultimate target. As the pattern unfolds over time, other aspects of the technical picture are likely to take precedent. Technical analysis is dynamic, and your analysis should incorporate aspects of the long-, medium- and short-term picture.
hefeiddd
发表于 2009-3-15 11:06
Falling Wedge (Reversal)The falling wedge is a bullish pattern that begins wide at the top and contracts as prices move lower. This price action forms a cone that slopes down as the reaction highs and reaction lows converge. In contrast to symmetrical triangles, which have no definitive slope and no bias, falling wedges definitely slope down and have a bullish bias. However, this bullish bias cannot be realized until a resistance breakout.
The falling wedge can also fit into the continuation category. As a continuation pattern, the falling wedge will still slope down, but the slope will be against the prevailing uptrend. As a reversal pattern, the falling wedge slopes down and with the prevailing trend. Regardless of the type (reversal or continuation), falling wedges are regarded as bullish patterns.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/fallingwedge-rdc.png
Prior Trend: To qualify as a reversal pattern, there must be a prior trend to reverse. Ideally, the falling wedge will form after an extended downtrend and mark the final low. The pattern usually forms over a 3-6 month period and the preceding downtrend should be at least 3 months old.
Upper Resistance Line: It takes at least two reaction highs to form the upper resistance line, ideally three. Each reaction high should be lower than the previous highs.
Lower Support Line: At least two reaction lows are required to form the lower support line. Each reaction low should be lower than the previous lows.
Contraction: The upper resistance line and lower support line converge to form a cone as the pattern matures. The reaction lows still penetrate the previous lows, but this penetration becomes shallower. Shallower lows indicate a decrease in selling pressure and create a lower support line with less negative slope than the upper resistance line.
Resistance Break: Bullish confirmation of the pattern does not come until the resistance line is broken in convincing fashion. It is sometimes prudent to wait for a break above the previous reaction high for further confirmation. Once resistance is broken, there can sometimes be a correction to test the newfound support level.
[*]Volume: While volume is not particularly important on rising wedges, it is an essential ingredient to confirm a falling wedge breakout. Without an expansion of volume, the breakout will lack conviction and be vulnerable to failure.
As with rising wedges, the falling wedge can be one of the most difficult chart patterns to accurately recognize and trade. When lower highs and lower lows form, as in a falling wedge, a security remains in a downtrend. The falling wedge is designed to spot a decrease in downside momentum and alert technicians to a potential trend reversal. Even though selling pressure may be diminishing, demand does not win out until resistance is broken. As with most patterns, it is important to wait for a breakout and combine other aspects of technical analysis to confirm signals.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/fallingwedge-fcx.png
FCX provides a textbook example of a falling wedge at the end of a long downtrend.
Prior Trend: The downtrend for FCX began in the third quarter of 1997. There was a brief advance in Mar-98, but the downtrend resumed and the stock was trading at new lows by Feb-99.
Upper Resistance Line: The upper resistance line formed with four successively lower peaks.
Lower Support Line: The lower support line formed with four successive lower lows.
Contraction: The upper resistance line and lower support line converged as the pattern matured. Even though each low is lower than the previous low, these lows are only slightly lower. The shallowness of the new lows indicates that demand is stepping almost immediately after a new low is recorded. The supply overhang remains, but slope of the upper resistance line is more negative than the lower support line.
Resistance Break: In contrast to the three previous lows, the late February low was flat and consolidated just above 9 for a few weeks. The subsequent breakout in March occurred with a series of strong advances. In addition, there was a positive divergence in the PPO.
Volume: After the large volume decline on 24-Feb (red arrow), upside volume began to increase. Above-average volume continued on advancing days and when the stock broke trend line resistance. Money flows confirmed the strength by surpassing their Nov-98 high and moving to their highest level since Apr-98.
[*]After the trend line breakout, there was a brief pullback to support from the trend line extension. The stock consolidated for a few weeks and then advanced further on increased volume again.
hefeiddd
发表于 2009-3-15 11:07
Rising Wedge (Reversal)The rising wedge is a bearish pattern that begins wide at the bottom and contracts as prices move higher and the trading range narrows. In contrast to symmetrical triangles, which have no definitive slope and no bullish or bearish bias, rising wedges definitely slope up and have a bearish bias.
Even though this article will focus on the rising wedge as a reversal pattern, the pattern can also fit into the continuation category. As a continuation pattern, the rising wedge will still slope up, but the slope will be against the prevailing downtrend. As a reversal pattern, the rising wedge will slope up and with the prevailing trend. Regardless of the type (reversal or continuation), rising wedges are bearish.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/risingwedge-dell.png
Prior Trend: In order to qualify as a reversal pattern, there must be a prior trend to reverse. The rising wedge usually forms over a 3-6 month period and can mark an intermediate or long-term trend reversal. Sometimes the current trend is totally contained within the rising wedge; other times the pattern will form after an extended advance.
Upper Resistance Line: It takes at least two reaction highs to form the upper resistance line, ideally three. Each reaction high should be higher than the previous high.
Lower Support Line: At least two reaction lows are required to form the lower support line. Each reaction low should be higher than the previous low.
Contraction: The upper resistance line and lower support line converge as the pattern matures. The advances from the reaction lows (lower support line) become shorter and shorter, which makes the rallies unconvincing. This creates an upper resistance line that fails to keep pace with the slope of the lower support line and indicates a supply overhang as prices increase.
Support Break: Bearish confirmation of the pattern does not come until the support line is broken in a convincing fashion. It is sometimes prudent to wait for a break of the previous reaction low. Once support is broken, there can sometimes be a reaction rally to test the newfound resistance level.
[*]Volume: Ideally, volume will decline as prices rise and the wedge evolves. An expansion of volume on the support line break can taken as bearish confirmation.
The rising wedge can be one of the most difficult chart patterns to accurately recognize and trade. While it is a consolidation formation, the loss of upside momentum on each successive high gives the pattern its bearish bias. However, the series of higher highs and higher lows keeps the trend inherently bullish. The final break of support indicates that the forces of supply have finally won out and lower prices are likely. There are no measuring techniques to estimate the decline – other aspects of technical analysis should be employed to forecast price targets.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/risingwedge-ann.png
ANN provides a good example of the rising wedge as a reversal pattern that forms in the face of weakening momentum and money flow.
Prior Trend: From a low around 10 in Oct-98, ANN surpassed 23 in less than 7 months. The final leg up was a sharp advance from below 15 in Feb. to 23.5 in mid-April.
Upper Resistance Line: The upper resistance line formed with three successively higher peaks.
Lower Support Line: The lower support line formed with three successive higher lows.
Contraction: The upper resistance line and lower support line converged as the pattern matured. A visual assessment confirms that the slope of the lower support line is steeper than that of the upper resistance line. Less slope in the upper resistance line indicates that momentum is waning as the stock makes new highs.
Support Break: The stock hugged the support line for over a week before finally breaking with a sharp decline. The previous reaction low was broken a few days later with long black candlestick (red arrow).
Volume: Chaikin Money Flow turned negative in late April and was well below -10% when the support line was broken. There was an expansion of volume when the previous reaction low was broken.
[*]Support from the April reaction low around 20 turned into resistance and the stock tested this level in early July before declining further.
hefeiddd
发表于 2009-3-15 11:08
Rounding Bottom (Reversal)The rounding bottom is a long-term reversal pattern that is best suited for weekly charts. It is also referred to as a saucer bottom, and represents a long consolidation period that turns from a bearish bias to a bullish bias.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/roundingbot-bby.png
Prior Trend: In order to be a reversal pattern, there must be a prior trend to reverse. Ideally, the low of a rounding bottom will mark a new low or reaction low. In practice, there are occasions when the low is recorded many months earlier and the security trades flat before forming the pattern. When the rounding bottom does finally form, its low may not be the lowest low of the last few months.
Decline: The first portion of the rounding bottom is the decline that leads to the low of the pattern. This decline can take on different forms: some are quite jagged with a number of reaction highs and lows, while others trade lower in a more linear fashion.
Low: The low of the rounding bottom can resemble a "V' bottom, but should not be too sharp and should take a few weeks to form. Because prices are in a long-term decline, the possibility of a selling climax exists that could create a lower spike.
Advance: The advance off of the lows forms the right half of the pattern and should take about the same amount of time as the prior decline. If the advance is too sharp, then the validity of a rounding bottom may be in question.
Breakout: Bullish confirmation comes when the pattern breaks above the reaction high that marked the beginning of the decline at the start of the pattern. As with most resistance breakouts, this level can become support. However, rounding bottoms represent long-term reversal and this new support level may not be that significant.
[*]Volume: In an ideal pattern, volume levels will track the shape of the rounding bottom: high at the beginning of the decline, low at the end of the decline and rising during the advance. Volume levels are not too important on the decline, but there should be an increase in volume on the advance and preferably on the breakout.
A rounding bottom could be thought of as a head and shoulders bottom without readily identifiable shoulders. The head represents the low and is fairly central to the pattern. The volume patterns are similar and confirmation comes with a resistance breakout. While symmetry is preferable on the rounding bottom, the left and right side do not have to be equal in time or slope. The important thing is to capture the essence of the pattern.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/roundingbot-amgn.png
AMGN provides an example of a rounding bottom that formed after a long consolidation period. Throughout 1996, the stock traded in a tight range bound by 16.63 and 12.83. The trading range continued the first half of 1997 and the stock broke support by falling to a low of 12 in August.
Prior Trend: With the break of support at 12.83, it appeared that a downtrend had begun. Even though the decline was not that sharp, the new reaction low represented a 52-week low. AMGN was clearly not in an uptrend.
Decline: The stock declined from 17 to a low of 11.22 and a pair of hammers formed in Oct-98 to mark the end of the decline (red arrow).
Low: Prior to the hammers, the stock traded around 12 for the previous 6 weeks. When the gap up with high volume followed the hammers, it appeared that a low had been formed. After a short rally, there was another test of the low and a higher low formed at 11.66.
Advance: From the second low at 11.66, the advance began in earnest and volume started to increase. In March, there was a large advance with the highest volume in 4 months (green arrow).
May-97 resistance at 17 represented the confirmation line for the pattern. The stock broke resistance in Jul-98 with a further expansion of volume. This breakout was also confirmed with a new high in OBV.
[*]After breaking resistance, there was a test of support and the stock actually fell back below 17. The stock had advanced from 11.66 to 19.84 in 6 months and some sort of pullback could have been expected.
hefeiddd
发表于 2009-3-15 11:09
Triple Top (Reversal)The triple top is a reversal pattern made up of three equal highs followed by a break below support. In contrast to the triple bottom, triple tops usually form over a shorter time frame and typically range from 3 to 6 months. Generally speaking, bottoms take longer to form than tops. We will first examine the individual parts of the pattern and then look at an example.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/tripletop-rev-chb.png
Prior Trend: With any reversal pattern, there should be an existing trend to reverse. In the case of the triple top, an uptrend or long trading range should be in place. Sometimes there will be a definitive uptrend to reverse. Other times the uptrend will fade and become many months of sideways trading.
Three Highs: All three highs should be reasonable equal, well spaced and mark significant turning points. The highs do not have to be exactly equal, but should be reasonably equivalent to each other.
Volume: As the triple top develops, overall volume levels usually decline. Volume sometimes increases near the highs. After the third high, an expansion of volume on the subsequent decline and at the support break greatly reinforces the soundness of the pattern.
Support Break: As with many other reversal patterns, the triple top is not complete until a support break. The lowest point of the formation, which would be the lowest of the intermittent lows, marks this key support level.
Support Turns Resistance: Broken support becomes potential resistance, and there is sometimes a test of this newfound resistance level with a subsequent reaction rally.
[*]Price Target: The distance from the support break to highs can be measured and subtracted from the support break for a price target. The longer the pattern develops, the more significant is the ultimate break. Triple tops that are 6 or more months old represent major tops and a price target is less likely to be effective.
Throughout the development of the triple top, it can start to resemble a number of patterns. Before the third high forms, the pattern may look like a double top. Three equal highs can also be found in an ascending triangle or rectangle. Of these patterns mentioned, only the ascending triangle has bullish overtones; the others are neutral until a break occurs. In this same vein, the triple top should also be treated as a neutral pattern until a breakout occurs. The inability to break above resistance is bearish, but the bears have not won the battle until support is broken. Volume on the last decline off resistance can sometimes yield a clue. If there is a sharp increase in volume and momentum, then the chances of a support break increase.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/tripletop-rev-rok.png
When looking for patterns, it is important to keep in mind that technical analysis is more art and less science. Pattern interpretations should be fairly specific, but not overly exacting as to obstruct the spirit of the pattern. A pattern may not fit the description to the letter, but that should not detract from its robustness. For example: it can be difficult to find a triple top with three highs that are exactly equal. However, if the highs are within reasonable proximity and other aspects of the technical analysis picture jibe, it would embody the spirit of a triple top. The spirit is three attempts at resistance, followed by a breakdown below support, with volume confirmation. ROK illustrates an example of a triple top that does not fit exactly, but captures the spirit of the pattern.
The stock was in an uptrend and remained above the trend line extending up from Oct-98 until the break in late August 1999.
Over a period of about 4 months, the stock bounced off resistance around 23. The first attempt happened in May, the second in July and the third in August.
The decline from the third high broke trend line support and the stock continued to fall past support from the previous lows. Triple top support should be drawn from the lowest low of the pattern, which would be the May low around 19.80.
Volume expanded after the stock broke trend line support. The stock paused for a few days when support at 19.80 was reached, but volume accelerated when this support level was broken in late September (gray dotted vertical line). In addition, the Chaikin Money Flow turned negative and broke below -10%.
After the support break, there was a test of the newfound resistance a few weeks later. Money flows continued to indicate selling pressure and volume expanded when the stock began to fall again.
[*]The projected decline was 3.2 points, from 19.80 down to 16.60, and the stock reached this target soon after the resistance test.
hefeiddd
发表于 2009-3-15 11:10
Triple Bottom (Reversal)The triple bottom is a reversal pattern made up of three equal lows followed by a breakout above resistance. While this pattern can form over just a few months, it is usually a long-term pattern that covers many months. Because of its long-term nature, weekly charts can be best suited for analysis. We will first examine the individual parts of the pattern and then look at an example.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/tripbot-rev-apc.png
Prior Trend: With any reversal pattern, there should be an existing trend to reverse. In the case of the triple bottom, a downtrend or long trading range should be in place. Sometimes there will be a definitive downtrend to reverse. Other times the downtrend will fade away after many months of sideways trading.
Three Lows: All three lows should be reasonable equal, well spaced and mark significant turning points. The lows do not have to be exactly equal, but should be reasonably equivalent.
Volume: As the triple bottom develops, overall volume levels usually decline. Volume sometimes increases near the lows. After the third low, an expansion of volume on the advance and at the resistance breakout greatly reinforces the soundness of the pattern.
Resistance Break: As with many other reversal patterns, the triple bottom is not complete until a resistance breakout. The highest point of the formation, which would be the highest of the intermittent highs, marks resistance.
Resistance Turns Support: Broken resistance becomes potential support, and there is sometimes a test of this newfound support level with the first correction. Because the triple bottom is a long-term pattern, the test of newfound support may occur many months later.
[*]Price Target: The distance from the resistance breakout to lows can be measured and added to the resistance break for a price target. The longer the pattern develops, the more significant is the ultimate breakout. Triple bottoms that are 6 or more months in duration represent major bottoms and a price target is less likely to be effective.
As the triple bottom develops, it can start to resemble a number of patterns. Before the third low forms, the pattern may look like a double bottom. Three equal lows can also be found in a descending triangle or rectangle. Of these patterns mentioned, only the descending triangle has bearish overtones; the others are neutral until a breakout occurs. Similarly, the triple bottom should also be treated as a neutral pattern until a breakout occurs. The ability to hold support is bullish, but demand has not won the battle until resistance is broken. Volume on the last advance can sometimes yield a clue. If there is a sharp increase in volume and momentum, then the chances of a breakout increase.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/tripbot-rev-andw.png
After a failed double bottom breakout, ANDW formed a large triple bottom. While the new reaction high (black arrow) and potential double bottom breakout seemed bullish, the stock subsequently fell back to support.
Technically, the downtrend ended when the stock formed a higher low in Mar-99 and surpassed its Jan-99 high by closing above 20 in Jul-99 (black arrow). Even though the downtrend ended, it would have been difficult to label the trend bullish after the third test of support around 11.
Over a 13-month timeframe, three relatively equal lows formed in Oct-98, Mar-99 and Nov-99. When the Jul-00 high surpassed the Jan-99 high, the possibility of a rectangle pattern was ruled out.
Resistance at 22 1/2 was broken in Jan-00. The stock closed above this key level for 5 consecutive weeks to confirm the breakout.
Even though volume expanded near the second and third lows, the 10-day EMA of volume declined between the lows. The advance off the third low saw a dramatic expansion of volume that lasted many weeks. The Accumulation/Distribution Line formed a positive divergence in 1999 and broke to new highs with the stock in Jan-00.
After the resistance break, the stock fell below 22 1/2 twice over the next 2 months. Based on the Feb-00 and Apr-00 lows, a new support level was established at 20 and. Because upside movement was limited after the breakout (a high of 25 1/2), a pullback below 22 1/2 might have been expected. Based on Oct-99 resistance, critical support could have been marked at 18 1/2.
[*]ANDW built a base over a 13-month period. Even though the height of the pattern is relatively impressive, it pales in comparison to the length of the base. The length of this pattern and subsequent breakout suggest a long-term change of sentiment.
hefeiddd
发表于 2009-3-15 11:10
Bump and Run Reversal (Reversal)As the name implies, the Bump and Run Reversal (BARR) is a reversal pattern that forms after excessive speculation drives prices up too far, too fast. Developed by Thomas Bulkowski, the pattern was introduced in the June-97 issue of Technical Analysis of Stocks and Commodities and also included in his recently published book, the Encyclopedia of Chart Patterns.
The pattern was originally named the Bump and Run Formation, or BARF. Bulkowski decided that Wall Street was not ready for such an acronym and changed the name to Bump and Run Reversal. Bulkowski identified three main phases to the pattern: lead-in, bump and run. We will examine these phases and also look at volume and pattern validation.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/barr-intl.png
Lead-in Phase: The first part of the pattern is a lead-in phase that can last 1 month or longer and forms the basis from which to draw the trend line. During this phase, prices advance in an orderly manner, and there is no excess speculation. The trend line should be moderately steep. If it is too steep, then the ensuing bump is unlikely to be significant enough. If the trend line is not steep enough, then the subsequent trend line break will occur too late. Bulkowski advises that an angle of 30 to 45 degrees is preferable. The size of the angle will depend on the scaling (semi-log or arithmetic) and the size of the chart. It is probably easier to judge the soundness of the trend line with a visual assessment.
Bump Phase: The bump forms with a sharp advance, and prices move further away from the lead-in trend line. Ideally, the angle of the trend line from the bump's advance should be about 50% greater than the angle of the trend line extending up from the lead-in phase. Roughly speaking, this would call for an angle between 45 and 60 degrees. If it is not possible to measure the angles, then a visual assessment will suffice.
Bump Validity: It is important that the bump represent a speculative advance that cannot be sustained for a long time. Bulkowski developed what he calls an "arbitrary" measuring technique to validate the level of speculation in the bump. The distance from the highest high of the bump to the lead-in trend line should be at least twice the distance from the highest high in the lead-in phase to the lead-in trend line. These distances can be measured by drawing a vertical line from the highest highs to the lead-in trend line. An example is provided below.
Bump Rollover: After speculation dies down, prices begin to peak and a top forms. Sometimes, a small double top or a series of descending peaks forms. Prices begin to decline towards the lead-in trend line, and the right side of the bump forms.
Volume: As the stock advances during the lead-in phase, volume is usually average and sometimes low. When the speculative advance begins to form the left side of the bump, volume expands as the advance accelerates.
Run Phase: The run phase begins when the pattern breaks support from the lead-in trend line. Prices will sometimes hesitate or bounce off the trend line before breaking through. Once the break occurs, the run phase takes over, and the decline continues.
[*]Support Turns Resistance: After the trend line is broken, there is sometimes a retracement that tests the newfound resistance level. Potential support-turned-resistance levels can also be identified from the reaction lows within the bump.
The Bump and Run Reversal pattern can be applied to daily, weekly or monthly charts. As stated above, the pattern is designed to identify speculative advances that are unsustainable for a long period. Because prices rise very fast to form the left side of the bump, the subsequent decline can be just as ferocious.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/barr-lvlt.png
Level Three Communications (LVLT) formed a Bump and Run Reversal pattern after prices advanced in a speculative frenzy at the beginning of 2000. Prices advanced from 72 to 132 in 2 months and this advance ultimately proved unsustainable.
The lead-in phase formed over a 3 month period from early Oct-99 to early Jan-00. Volume during this phase was relatively subdued, and actually declined during the November and December advance.
The trend line extending up from the lead-in phase lows formed a 34 degree angle. A visual assessment also reveals that this trend line is neither too steep nor too flat.
The bump phase began in early January when the advance accelerated with a large increase in volume. A conservatively drawn trend line formed a 51 degree angle that was exactly 50% larger than the angle from the lead-in trend line.
The distance from the lead-in phase's highest high to the trend line. was 13. The distance from the Bump Phase's highest high to the trend line was 38. This is almost three times larger, and validates the speculative excesses in the bump.
After reaching a high around 132, prices declined sharply, and bounced off the lead-in trend line. A lower high formed around 115 (red arrow), and the trend line was soon broken.
[*]The decline continued after the trend line break, and reached 67 before a reaction rally began. The reaction rally advanced to around 95, but fell just short of the horizontal support line before falling back to new lows.
hefeiddd
发表于 2009-3-15 11:11
Flag, Pennant (Continuation)Flags and Pennants are short-term continuation patterns that mark a small consolidation before the previous move resumes. These patterns are usually preceded by a sharp advance or decline with heavy volume, and mark a mid-point of the move.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/flagpennant-dell.png
Sharp Move: To be considered a continuation pattern, there should be evidence of a prior trend. Flags and pennants require evidence of a sharp advance or decline on heavy volume. These moves usually occur on heavy volume and can contain gaps. This move usually represents the first leg of a significant advance or decline and the flag/pennant is merely a pause.
Flagpole: The flagpole is the distance from the first resistance or support break to the high or low of the flag/pennant. The sharp advance (or decline) that forms the flagpole should break a trend line or resistance/support level. A line extending up from this break to the high of the flag/pennant forms the flagpole.
Flag: A flag is a small rectangle pattern that slopes against the previous trend. If the previous move was up, then the flag would slope down. If the move was down, then the flag would slope up. Because flags are usually too short in duration to actually have reaction highs and lows, the price action just needs to be contained within two parallel trend lines.
Pennant: A pennant is a small symmetrical triangle that begins wide and converges as the pattern matures (like a cone). The slope is usually neutral. Sometimes there will not be specific reaction highs and lows from which to draw the trend lines and the price action should just be contained within the converging trend lines.
Duration: Flags and pennants are short-term patterns that can last from 1 to 12 weeks. There is some debate on the timeframe and some consider 8 weeks to be pushing the limits for a reliable pattern. Ideally, these patterns will form between 1 and 4 weeks. Once a flag becomes more than 12 weeks old, it would be classified as a rectangle. A pennant more than 12 weeks old would turn into a symmetrical triangle. The reliability of patterns that fall between 8 and 12 weeks is debatable.
Break: For a bullish flag or pennant, a break above resistance signals that the previous advance has resumed. For a bearish flag or pennant, a break below support signals that the previous decline has resumed.
Volume: Volume should be heavy during the advance or decline that forms the flagpole. Heavy volume provides legitimacy for the sudden and sharp move that creates the flagpole. An expansion of volume on the resistance (support) break lends credence to the validity of the formation and the likelihood of continuation.
[*]Targets: The length of the flagpole can be applied to the resistance break or support break of the flag/pennant to estimate the advance or decline.
Even though flags and pennants are common formations, identification guidelines should not be taken lightly. It is important that flags and pennants are preceded by a sharp advance or decline. Without a sharp move, the reliability of the formation becomes questionable and trading could carry added risk. Look for volume confirmation on the initial move, consolidation and resumption to augment the robustness of pattern identification.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/flagpennant-hwp.png
HWPhttp://stockcharts.com/images/minilink_sc.gif provides an example of a flag that forms after a sharp and sudden advance.
Sharp Move: After consolidating for three months, HWP broke above resistance at 28 to begin a sharp advance. The 5-April high and 16-Feb trend line marked resistance and the breakout occurred with a volume expansion. The stock advanced from 28 to 38 in a mere 4 weeks. (Note: It is also possible that a small pennant formed in early May with resistance around 31).
Flagpole: The distance from the breakout at 28 to the flag's high at 38 formed the flagpole.
Flag: Price action was contained within two parallel trend lines that sloped down.
Duration: From a high at 38 to the breakout at 36, the flag formed over a 23-day period.
Breakout: The first break above the flag's upper trend line occurred on 21-June without an expansion of volume. However, the stock gapped up a week later and closed strong with above-average volume (red arrows)
Volume: To recap - volume expanded on the sharp advance to form the flagpole, contracted during the flag's formation and expanded right after the resistance breakout.
[*]Targets: The length of the flagpole measured 10 points and was applied to the resistance breakout at 36 to project a target of 46.
hefeiddd
发表于 2009-3-15 11:12
Symmetrical Triangle (Continuation)The symmetrical triangle, which can also be referred to as a coil, usually forms during a trend as a continuation pattern. The pattern contains at least two lower highs and two higher lows. When these points are connected, the lines converge as they are extended and the symmetrical triangle takes shape. You could also think of it as a contracting wedge, wide at the beginning and narrowing over time.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/symmetrical_triangle_continuation/symtri-conti-sun2.png
While there are instances when symmetrical triangles mark important trend reversals, they more often mark a continuation of the current trend. Regardless of the nature of the pattern, continuation or reversal, the direction of the next major move can only be determined after a valid breakout. We will examine each part of the symmetrical triangle individually, and then provide an example with Conseco.
Trend: In order to qualify as a continuation pattern, an established trend should exist. The trend should be at least a few months old and the symmetrical triangle marks a consolidation period before continuing after the breakout.
Four (4) Points: At least 2 points are required to form a trend line and 2 trend lines are required to form a symmetrical triangle. Therefore, a minimum of 4 points are required to begin considering a formation as a symmetrical triangle. The second high (2) should be lower than the first (1) and the upper line should slope down. The second low (2) should be higher than the first (1) and the lower line should slope up. Ideally, the pattern will form with 6 points (3 on each side) before a breakout occurs.
Volume: As the symmetrical triangle extends and the trading range contracts, volume should start to diminish. This refers to the quiet before the storm, or the tightening consolidation before the breakout.
Duration: The symmetrical triangle can extend for a few weeks or many months. If the pattern is less than 3 weeks, it is usually considered a pennant. Typically, the time duration is about 3 months.
Breakout Time Frame: The ideal breakout point occurs 1/2 to 3/4 of the way through the pattern's development or time-span. The time-span of the pattern can be measured from the apex (convergence of upper and lower lines) back to the beginning of the lower trend line (base). A break before the 1/2 way point might be premature and a break too close to the apex may be insignificant. After all, as the apex approaches, a breakout must occur sometime.
Breakout Direction: The future direction of the breakout can only be determined after the break has occurred. Sound obvious enough, but attempting to guess the direction of the breakout can be dangerous. Even though a continuation pattern is supposed to breakout in the direction of the long-term trend, this is not always the case.
Breakout Confirmation: For a break to be considered valid, it should be on a closing basis. Some traders apply a price (3% break) or time (sustained for 3 days) filter to confirm validity. The breakout should occur with an expansion in volume, especially on upside breakouts.
Return to Apex: After the breakout (up or down), the apex can turn into future support or resistance. The price sometimes returns to the apex or a support/resistance level around the breakout before resuming in the direction of the breakout.
[*]Price Target: There are two methods to estimate the extent of the move after the breakout. First, the widest distance of the symmetrical triangle can be measured and applied to the breakout point. Second, a trend line can be drawn parallel to the pattern's trend line that slopes (up or down) in the direction of the break. The extension of this line will mark a potential breakout target.
Edwards and Magee suggest that roughly 75% of symmetrical triangles are continuation patterns and the rest mark reversals. The reversal patterns can be especially difficult to analyze and often have false breakouts. Even so, we should not anticipate the direction of the breakout, but rather wait for it to happen. Further analysis should be applied to the breakout by looking for gaps, accelerated price movements, and volume for confirmation. Confirmation is especially important for upside breakouts.
Prices sometimes return to the breakout point of apex on a reaction move before resuming in the direction of the breakout. This return can offer a second chance to participate with a better reward to risk ratio. Potential reward price targets found by measurement and parallel trend line extension are only meant to act as rough guidelines. Technical analysis is dynamic and ongoing assessment is required. In the first example above, SUNW may have fulfilled its target (42) in a few months, but the stock gave no sign of slowing down and advanced above 100 in the following months.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/symmetrical_triangle_continuation/symtri-conti-cnc.png
Conseco (CNCEQ)http://stockcharts.com/images/minilink_sc.gif formed a rather large symmetrical triangle over a 5-month period before breaking out on the downside.
The stock declined from 50 in Mar-98 to 22 in Oct-98 before beginning to firm and consolidate. The low at 22 probably was an over-reaction, but the long-term trend was down and established for almost a year.
After the first 4 points formed, the lines of the symmetrical triangle were draw. The stock traded within the boundaries for another 2 months to form the last 2 points.
After the gap up from point 3 to point 4, volume slowed over the next few months. There was some increase in volume in late June, but the 60-day SMA remained in a downtrend as the pattern took shape.
The red square marks the ideal breakout time-span from 50% to 75% of the pattern. The breakout occurred a little over 2 weeks later, but proved valid nonetheless. While it is preferable to have an ideal pattern develop, it is also quite rare.
After points 5 and 6 formed, the price action moved to the lower boundary of the pattern. Even at this point, the direction of the breakout was still a guess and its was prudent to wait. The break occurred with an increase in volume and accelerated price decline. Chaikin Money Flow declined past -30% and volume exceeded the 60-day SMA for an extended period.
After the decline from 29 1/2 to 25 1/2, the stock rebounded, but failed to reach potential resistance from the apex. The weakness of the reaction rally foreshadowed the sharpness of the decline that followed.
[*]The widest point on the pattern extended 10 1/2 points. With a break of support at 29 1/2, the measured decline was estimated to around 19. By drawing a trend line parallel to the upper boundary of the pattern, the extension estimates a decline to around 20.
hefeiddd
发表于 2009-3-15 11:13
Ascending Triangle (Continuation)The ascending triangle is a bullish formation that usually forms during an uptrend as a continuation pattern. There are instances when ascending triangles form as reversal patterns at the end of a downtrend, but they are typically continuation patterns. Regardless of where they form, ascending triangles are bullish patterns that indicate accumulation.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/ascending_triangle_continuation/asctri-conti-wag.png
Because of its shape, the pattern can also be referred to as a right-angle triangle. Two or more equal highs form a horizontal line at the top. Two or more rising troughs form an ascending trend line that converges on the horizontal line as it rises. If both lines were extended right, the ascending trend line could act as the hypotenuse of a right triangle. If a perpendicular line were drawn extending down from the left end of the horizontal line, a right triangle would form. Let's examine each individual part of the pattern and then look at an example.
Trend: In order to qualify as a continuation pattern, an established trend should exist. However, because the ascending triangle is a bullish pattern, the length and duration of the current trend is not as important as the robustness of the formation, which is paramount.
Top Horizontal Line: At least 2 <gl reaction high>reaction highs<gl> are required to form the top horizontal line. The highs do not have to be exact, but they should be within reasonable proximity of each other. There should be some distance between the highs, and a reaction low between them.
Lower Ascending Trend Line: At least two reaction lows are required to form the lower ascending trend line. These reaction lows should be successively higher, and there should be some distance between the lows. If a more recent reaction low is equal to or less than the previous reaction low, then the ascending triangle is not valid.
Duration: The length of the pattern can range from a few weeks to many months with the average pattern lasting from 1-3 months.
Volume: As the pattern develops, volume usually contracts. When the upside breakout occurs, there should be an expansion of volume to confirm the breakout. While volume confirmation is preferred, it is not always necessary.
Return to Breakout: A basic tenet of technical analysis is that resistance turns into support and vice versa. When the horizontal resistance line of the ascending triangle is broken, it turns into support. Sometimes there will be a return to this support level before the move begins in earnest.
[*]Target: Once the breakout has occurred, the price projection is found by measuring the widest distance of the pattern and applying it to the resistance breakout.
In contrast to the symmetrical triangle, an ascending triangle has a definitive bullish bias before the actual breakout. If you will recall, the symmetrical triangle is a neutral formation that relies on the impending breakout to dictate the direction of the next move. On the ascending triangle, the horizontal line represents overhead supply that prevents the security from moving past a certain level. It is as if a large sell order has been placed at this level and it is taking a number of weeks or months to execute, thus preventing the price from rising further. Even though the price cannot rise past this level, the reaction lows continue to rise. It is these higher lows that indicate increased buying pressure and give the ascending triangle its bullish bias.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/ascending_triangle_continuation/asctri-conti-prtl.png
Primus Telecom (PRTL)http://stockcharts.com/images/minilink_sc.gif formed an ascending triangle over a 6-month period before breaking resistance with an expansion of volume.
From a low of 8.88 in April, the stock established an uptrend by forming a higher low at 8.94 and advancing to a new reaction high early June. (The beginning of the trend is not included on this chart.) After recording its highest price in 10 months, the stock met resistance at 24.
In June, the stock hit resistance at 23 a number of times and then again at 24 in July. The stock bounced off 24 at least three times in 5 months to form the horizontal resistance line. It was as if portions of a large block were being sold each time the stock neared 24.
The reaction lows were progressively higher, and formed an ascending trend line. The first low in May, 1999, occurred with a large spike down to 12.25, but the trend line was drawn to connect the prices grouped around 14. The ascending trend line could have been drawn to start at 12.25 and this version is shown with the gray trend line. The important thing is that there are at least two distinct reaction lows that are consecutively higher.
The duration of the pattern is around 6 months, which may seem a bit long. However, all the key ingredients for a robust pattern were in place.
Volume declined from late June until early October. There was a huge expansion when the stock fell from 23.44 (point 6) to 19.38 on two heavy trading days in October. However, this was only for two days and the stock found support around 20 to form a higher low. In keeping with the ideal pattern, the next expansion of volume occurred in early November when the stock broke resistance at 24. The stock traded at above average volume 7 of the 10 days surrounding the breakout, and all 7 were up days. Chaikin Money Flow dragged a bit from the two heavy down days, but recovered to +20% five days after the breakout.
The stock advanced to 30.75 before pulling back to around 26. Support was found above the original resistance breakout, and this indicated underlying strength in the stock.
[*]The initial advance was projected to be 10 (24 -14 = 10) points from the breakout at 24, making a target of 34. This target was reached within 2 months, but the stock didn't slow down until reaching 50 in March (not shown). Targets are only meant to be used as guidelines, and other aspects of technical analysis should also be employed for deciding when to sell.
hefeiddd
发表于 2009-3-15 11:14
Symmetrical Triangle (Continuation)The symmetrical triangle, which can also be referred to as a coil, usually forms during a trend as a continuation pattern. The pattern contains at least two lower highs and two higher lows. When these points are connected, the lines converge as they are extended and the symmetrical triangle takes shape. You could also think of it as a contracting wedge, wide at the beginning and narrowing over time.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/symmetrical_triangle_continuation/symtri-conti-sun2.png
While there are instances when symmetrical triangles mark important trend reversals, they more often mark a continuation of the current trend. Regardless of the nature of the pattern, continuation or reversal, the direction of the next major move can only be determined after a valid breakout. We will examine each part of the symmetrical triangle individually, and then provide an example with Conseco.
Trend: In order to qualify as a continuation pattern, an established trend should exist. The trend should be at least a few months old and the symmetrical triangle marks a consolidation period before continuing after the breakout.
Four (4) Points: At least 2 points are required to form a trend line and 2 trend lines are required to form a symmetrical triangle. Therefore, a minimum of 4 points are required to begin considering a formation as a symmetrical triangle. The second high (2) should be lower than the first (1) and the upper line should slope down. The second low (2) should be higher than the first (1) and the lower line should slope up. Ideally, the pattern will form with 6 points (3 on each side) before a breakout occurs.
Volume: As the symmetrical triangle extends and the trading range contracts, volume should start to diminish. This refers to the quiet before the storm, or the tightening consolidation before the breakout.
Duration: The symmetrical triangle can extend for a few weeks or many months. If the pattern is less than 3 weeks, it is usually considered a pennant. Typically, the time duration is about 3 months.
Breakout Time Frame: The ideal breakout point occurs 1/2 to 3/4 of the way through the pattern's development or time-span. The time-span of the pattern can be measured from the apex (convergence of upper and lower lines) back to the beginning of the lower trend line (base). A break before the 1/2 way point might be premature and a break too close to the apex may be insignificant. After all, as the apex approaches, a breakout must occur sometime.
Breakout Direction: The future direction of the breakout can only be determined after the break has occurred. Sound obvious enough, but attempting to guess the direction of the breakout can be dangerous. Even though a continuation pattern is supposed to breakout in the direction of the long-term trend, this is not always the case.
Breakout Confirmation: For a break to be considered valid, it should be on a closing basis. Some traders apply a price (3% break) or time (sustained for 3 days) filter to confirm validity. The breakout should occur with an expansion in volume, especially on upside breakouts.
Return to Apex: After the breakout (up or down), the apex can turn into future support or resistance. The price sometimes returns to the apex or a support/resistance level around the breakout before resuming in the direction of the breakout.
[*]Price Target: There are two methods to estimate the extent of the move after the breakout. First, the widest distance of the symmetrical triangle can be measured and applied to the breakout point. Second, a trend line can be drawn parallel to the pattern's trend line that slopes (up or down) in the direction of the break. The extension of this line will mark a potential breakout target.
Prices sometimes return to the breakout point of apex on a reaction move before resuming in the direction of the breakout. This return can offer a second chance to participate with a better reward to risk ratio. Potential reward price targets found by measurement and parallel trend line extension are only meant to act as rough guidelines. Technical analysis is dynamic and ongoing assessment is required. In the first example above, SUNW may have fulfilled its target (42) in a few months, but the stock gave no sign of slowing down and advanced above 100 in the following months.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/symmetrical_triangle_continuation/symtri-conti-cnc.png
The stock declined from 50 in Mar-98 to 22 in Oct-98 before beginning to firm and consolidate. The low at 22 probably was an over-reaction, but the long-term trend was down and established for almost a year.
After the first 4 points formed, the lines of the symmetrical triangle were draw. The stock traded within the boundaries for another 2 months to form the last 2 points.
After the gap up from point 3 to point 4, volume slowed over the next few months. There was some increase in volume in late June, but the 60-day SMA remained in a downtrend as the pattern took shape.
The red square marks the ideal breakout time-span from 50% to 75% of the pattern. The breakout occurred a little over 2 weeks later, but proved valid nonetheless. While it is preferable to have an ideal pattern develop, it is also quite rare.
After points 5 and 6 formed, the price action moved to the lower boundary of the pattern. Even at this point, the direction of the breakout was still a guess and its was prudent to wait. The break occurred with an increase in volume and accelerated price decline. Chaikin Money Flow declined past -30% and volume exceeded the 60-day SMA for an extended period.
After the decline from 29 1/2 to 25 1/2, the stock rebounded, but failed to reach potential resistance from the apex. The weakness of the reaction rally foreshadowed the sharpness of the decline that followed.
[*]The widest point on the pattern extended 10 1/2 points. With a break of support at 29 1/2, the measured decline was estimated to around 19. By drawing a trend line parallel to the upper boundary of the pattern, the extension estimates a decline to around 20.
hefeiddd
发表于 2009-3-15 11:15
Descending Triangle (Continuation)The descending triangle is a bearish formation that usually forms during a downtrend as a continuation pattern. There are instances when descending triangles form as reversal patterns at the end of an uptrend, but they are typically continuation patterns. Regardless of where they form, descending triangles are bearish patterns that indicate distribution.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/desctri-conti-dd.png
Because of its shape, the pattern can also be referred to as a right-angle triangle. Two or more comparable lows form a horizontal line at the bottom. Two or more declining peaks form a descending trend line above that converges with the horizontal line as it descends. If both lines were extended right, the descending trend line could act as the hypotenuse of a right triangle. If a perpendicular line were drawn extending up from the left end of the horizontal line, a right triangle would form. Let's examine each individual part of the pattern and then look at an example.
Trend: In order to qualify as a continuation pattern, an established trend should exist. However, because the descending triangle is definitely a bearish pattern, the length and duration of the current trend is not as important. The robustness of the formation is paramount.
Lower Horizontal Line: At least 2 reaction lows are required to form the lower horizontal line. The lows do not have to be exact, but should be within reasonable proximity of each other. There should be some distance separating the lows and a reaction high between them.
Upper Descending Trend Line: At least two reaction highs are required to form the upper descending trend line. These reaction highs should be successively lower and there should be some distance between the highs. If a more recent reaction high is equal to or greater than the previous reaction high, then the descending triangle is not valid.
Duration: The length of the pattern can range from a few weeks to many months, with the average pattern lasting from 1-3 months.
Volume: As the pattern develops, volume usually contracts. When the downside break occurs, there would ideally be an expansion of volume for confirmation. While volume confirmation is preferred, it is not always necessary.
Return to Breakout: A basic tenet of technical analysis is that broken support turns into resistance and visa versa. When the horizontal support line of the descending triangle is broken, it turns into resistance. Sometimes there will be a return to this newfound resistance level before the down move begins in earnest.
[*]Target: Once the breakout has occurred, the price projection is found by measuring the widest distance of the pattern and subtracting it from the resistance breakout.
In contrast to the symmetrical triangle, a descending triangle has a definite bearish bias before the actual break. The symmetrical triangle is a neutral formation that relies on the impending breakout to dictate the direction of the next move. For the descending triangle, the horizontal line represents demand that prevents the security from declining past a certain level. It is as if a large buy order has been placed at this level and it is taking a number of weeks or months to execute, thus preventing the price from declining further. Even though the price does not decline past this level, the reaction highs continue to decline. It is these lower highs that indicate increased selling pressure and give the descending triangle its bearish bias.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/desctri-conti-nue.png
After recording a lower high just below 60 in Dec-99, Nucorhttp://stockcharts.com/images/minilink_sc.gif formed a descending triangle early in 2000. In late April, the stock broke support with a gap down, sharp break and increase in volume to complete the formation.
The stock declined from above 60 to the low 40s before finding some support and mounting a reaction rally. The rally stalled just below 50 and a series of lower reaction highs began to form. The long-term trend was down and the resulting pattern was classified as continuation.
Support at 45 was first established with a bounce in February. After that, the stock touched this level two more times before breaking down. After the second touch in March (about a month later), the lower support line was drawn.
After each bounce off support, a lower high formed. The reaction highs at points 2,4 and 6 formed the descending trend line to mark the potential descending triangle pattern. I say potential because the pattern is not complete until support is broken.
The duration of the pattern was a little less than 3 months.
The last touch of support at 45 occurred in late April. The stock spiked down through support, but managed to close above this key level. The final break occurred a few days later with a gap down, a considerable black candlestick and an expansion in volume. The way support is broken can offer insight into the general weakness of a security. This was not a slight break, but a rather convincing break. Volume jumped to the highest level in many months and money flows broke below -10%.
After falling from 45 to 41, the stock mounted a feeble reaction rally that only lasted three days and produced two candlesticks with long upper shadows. Sometimes there is a test of the newfound resistance level, and sometimes there isn't. A weak test of support can indicate acute selling pressure.
[*]The initial decline was projected to be 9 points (54 -45 = 9). If this is subtracted from the support break at 45, the downside projection is to around 36. Even though the stock exceeded this target in late June, recent strength has brought it back near 36. Targets are only meant to be used as guidelines and other aspects of technical analysis should also be employed for deciding when to cover a short or buy.
hefeiddd
发表于 2009-3-15 11:16
Rectangle (Continuation)A Rectangle is a continuation pattern that forms as a trading range during a pause in the trend. The pattern is easily identifiable by two comparable highs and two comparable lows. The highs and lows can be connected to form two parallel lines that make up the top and bottom of a rectangle. Rectangles are sometimes referred to as trading ranges, consolidation zones or congestion areas.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/rect-conti-lmt.png
There are many similarities between the rectangle and the symmetrical triangle. While both are usually continuation patterns, they can also mark trend significant tops and bottoms. As with the symmetrical triangle, the rectangle pattern is not complete until a breakout has occurred. Sometimes clues can be found, but the direction of the breakout is usually not determinable beforehand. We will examine each part of the rectangle and then provide an example with MU.
Trend: To qualify as a continuation pattern, a prior trend should exist. Ideally, the trend should be a few months old and not too mature. The more mature the trend, the less chance that the pattern marks a continuation.
Four (4) Points: At least two equivalent reaction highs are required to form the upper resistance line and two equivalent reaction lows to form the lower support line. They do not have to be exactly equal, but should be within a reasonable proximity. Although not a prerequisite, it is preferable that the highs and lows alternate.
Volume: As opposed to the symmetrical triangle, rectangles do not exhibit standard volume patterns. Sometimes volume will decline as the pattern develops. Other times volume will gyrate as the prices bounce between support and resistance. Rarely will volume increase as the pattern matures. If volume declines, it is best to look for an expansion on the breakout for confirmation. If volume gyrates, it is best to assess which movements (advances to resistance or declines to support) are receiving the most volume. This type of volume assessment could offer an indication on the direction of the future breakout.
Duration: Rectangles can extend for a few weeks or many months. If the pattern is less than 3 weeks, it is usually considered a flag, also a continuation pattern. Ideally, rectangles will develop over a 3-month period. Generally, the longer the pattern, the more significant the breakout. A 3-month pattern might be expected to fulfill its breakout projection. However, a 6-month pattern might be expected to exceed its breakout target.
Breakout Direction: The direction of the next significant move can only be determined after the breakout has occurred. As with the symmetrical triangle, rectangles are neutral patterns that are dependent on the direction of the future breakout. Volume patterns can sometimes offer clues, but there is no confirmation until an actual break above resistance or break below support.
Breakout Confirmation: For a breakout to be considered valid, it should be on a closing basis. Some traders apply a filter to price (3%), time (3 days) or volume (expansion) for confirmation.
Return to Breakout: A basic tenet of technical analysis is that broken support turns into potential resistance and visa versa. After a break above resistance (below support), there is sometimes a return to test this newfound support level (resistance level). (For more detail, see this article on support and resistance.) A return to or near the original breakout level can offer a second chance to participate.
[*]Target: The estimated move is found by measuring the height of the rectangle and applying it to the breakout.
Rectangles represent a trading range that pits the bulls against the bears. As the price nears support, buyers step in and push the price higher. As the price nears resistance, bears take over and force the price lower. Nimble traders sometimes play these bounces by buying near support and selling near resistance. One group (bulls or bears) will exhaust itself and a winner will emerge when there is a breakout. Again, it is important to remember that rectangles have a neutral bias. Even though clues can sometimes be gleaned from volume patterns, the actual price action depicts a market in conflict. Only until the price breaks above resistance or below support will it be clear which group has won the battle.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/rect-conti-mu.png
In the summer of 1999, Micron Electronics (MU)http://stockcharts.com/images/minilink_sc.gif advanced from the high teens to the low forties. After meeting resistance around 42, the stock settled in a trading range between 40 and 30 to form a rectangle.
The prior intermediate trend was established as bullish by the advance from the high teens to the low forties. However, it was unclear at the time if this trading range would be a reversal or a continuation pattern. The horizontal resistance line at 40 can be extended back to the Feb-99 high and marked a serious resistance level.
The red resistance line at 40 was formed with three reaction highs. The first reaction high may be a bit suspect, but the second two are robust. The parallel support line at 30 was touched three times and established a solid support level. After the high at point 5 was reached, the rectangle was valid.
As the pattern developed, volume fluctuated and there was no clear indication (bullish or bearish break) until mid-February. The first bullish clue came when the stock declined from 38 to 31 and Chaikin Money Flow failed to move below -10%. Money flows held steady throughout the decline and turned positive as soon as the stock turned back up. By the time the stock reached 39 3/4 (surpassing its previous reaction high in the process), CMF was at +20%. Also notice the strength behind the advance after a higher low.
The duration of the pattern was 5 months. Due to long-term overhead resistance at 40, the pattern needed more time to consolidate before a breakout. The longer consolidation made for bigger expectations after the breakout.
The breakout occurred with a large expansion in volume and a huge moved above resistance.
After the breakout, there was a slight pullback to around 46, but the volume behind the advance indicated a huge breakout. Stocks do not always return to the point of breakout. In the example above, LMT makes a classic return to the breakout. The set up and strength behind the breakout should be assessed to determine the possibility of a second chance opportunity.
[*]The target advance of this breakout was 10 points, which was the width of the pattern. However, judging from the duration and strength of the breakout, expansion of volume and new all-time highs, it was apparent that this was no ordinary breakout. Therefore an ordinary target was useless! After an initial advance as high as 55 13/16, the stock pulled back to 46 and then moved above 70. Another trading range subsequently developed with resistance in the low 70s and support in the upper 40s.
hefeiddd
发表于 2009-3-15 11:16
Price Channel (Continuation)A price channel is a continuation pattern that slopes up or down and is bound by an upper and lower trend line. The upper trend line marks resistance and the lower trend line marks support. Price channels with negative slopes (down) are considered bearish and those with positive slopes (up) bullish. For explanatory purposes, a "bullish price channel" will refer to a channel with positive slope and a "bearish price channel" to a channel with negative slope.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/pricechannel-chv.png
Main Trend Line: It takes at least two points to draw the main trend line. This line sets the tone for the trend and the slope. For a bullish price channel, the main trend line extends up and at least two reaction lows are required to draw it. For a bearish price channel, the main trend line extends down and at least two reaction highs are required to draw it.
Channel Line: The line drawn parallel to the main trend line is called the channel line. Ideally, the channel line will be based off of two reaction highs or lows. However, after the main trend line has been established, some analysts draw the parallel channel line using only one reaction high or low. The channel line marks support in a bearish price channel and resistance in a bullish price channel.
Bullish Price Channel: As long as prices advance and trade within the channel, the trend is considered bullish. The first warning of a trend change occurs when prices fall short of channel line resistance. A subsequent break below main trend line support would provide further indication of a trend change. A break above channel line resistance would be bullish and indicate an acceleration of the advance.
Bearish Price Channel: As long as prices decline and trade within the channel, the trend is considered bearish. The first warning of a trend change occurs when prices fail to reach channel line support. A subsequent break above main trend line resistance would provide further indication of a trend change. A break below channel line support would be bearish and indicate an acceleration of the decline.
[*]Scaling: Even though it is a matter of personal preference, trend lines seem to match reaction highs and lows best when semi-log scales are used. Semi-log scales reflect price movements in percentage terms. A move from 50 to 100 will appear the same distance as a move from 100 to 200.
In a bullish price channel, some traders look to buy when prices reach main trend line support. Conversely, some traders look to sell (or short) when prices reach main trend line resistance in a bearish price channel. As with most price patterns, other aspects of technical analysis should be used to confirm signals.
Because technical analysis is just as much art as it is science, there is room for flexibility. Even though exact trend line touches are ideal, it is up to each individual to judge the relevance and placement of both the main trend line and the channel line. By that same token, a channel line that is exactly parallel to the main trend line is ideal.
http://stockcharts.com/school/data/media/chart_school/chart_analysis/chart_patterns/pricechannel-csco.png
CSCOhttp://stockcharts.com/images/minilink_sc.gif provides an example of an 11-month bullish price channel that developed in 1999.
Main Trend Line: The January, February and March reaction lows formed the beginning of the main trend line. Subsequent lows in April, May and August confirmed the main trend line.
Channel Line: Once the main trend line was in place, the channel line beginning from the January high was drawn. A visual assessment reveals that these trend lines look parallel. More precise analysts may want to test the slope of each line, but a visual inspection is usually enough to ensure the "essence" of the pattern.
Bullish Price Channel: Subsequent touches along the main trend line offered good buying opportunities in mid April, late May and mid August.
The stock did not reach channel line resistance until July (red arrow) and this marked a significant reaction high.
The September high (blue arrow) fell short of channel line resistance, but only by a small margin that was probably insignificant.
[*]The break above channel line resistance in Dec-99 marked an acceleration of the advance. Some analysts might consider the stock overextended after this move, but the advance was powerful and the trend never turned bearish. Price channels will not last forever, but the underlying trend remains in place until proved otherwise.