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Thomas Bulkowski’s successful investment activities allowed him to retire at age 36. He is an internationally known author and trader with 30 years of stock market experience and widely regarded as a leading expert on chart patterns. His books, including the best selling Encyclopedia of Chart Patterns, have been translated into many languages. He may be reached at

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Bulkowski's Trendline Mirrors

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Industrials (^DJI):
Transports (^DJT):
Utilities (^DJU):
Nasdaq (^IXIC):
S&P 500 (^GSPC):
As of 05/17/2013
15,354 121.18 0.8%
6,549 81.47 1.3%
517 4.83 0.9%
3,499 33.73 1.0%
1,667 17.00 1.0%
YTD
17.2%
23.4%
14.0%
15.9%
16.9%
Tom's Targets    Overview: 05/14/2013
15,500 or 14,850 by 06/01/2013
6,750 or 6,200 by 06/01/2013
525 or 500 by 06/01/2013
3,600 or 3,300 by 06/01/2013
1,700 or 1,600 by 06/01/2013
Wilder RSI: 22.7%

Written and copyright © 2010-2013 by Thomas N. Bulkowski. All rights reserved.

Trendline mirrors seem to reflect price across a trendline. That's useful when trying to predict how far price will move in the future.

Picture of Boeing on the daily scale.

The figure shows an example of a trendline mirror in Boeing on the daily scale.

Notice how the vertical distance at A mirrors the drop to D, not in shape but in extent. The reflection isn't a smooth one, but that's ok. It's the distance that interests us most (well, me, anyway). The BA move upward reflects across the trendline almost exactly to CD.

To use this method, starting from the breakout, C, find the highest distance from the most recent peak to the trendline directly below. That's the AB distance.

From the breakout apply this distance downward to get a price target (the price at C minus the AB distance). That method works 63% of the time. Thus, you can multiply the AB height by 63% and subtract that from the breakout (C) to get a target that price will reach over 90% of the time. Many of you will know this technique as the trendline measure rule. Look for trendline mirrors in finer stores nationwide.

-- Thomas Bulkowski

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Written and copyright © 2010-2013 by Thomas N. Bulkowski. All rights reserved. Worst month of the year for downhill skiing: August, but the lines are shortest.