Thomas N. Bulkowski

Encyclopedia of Chart Patterns


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position, performance. I sorted the breakout price into one of three bins. Upward breakouts show the best performance when the breakout price appears in the middle third of the yearly high–low price range. Downward breakouts favor the lowest third of the range.

      Throwbacks and pullbacks. A throwback or pullback occurs about two‐thirds of the time, and it takes 11 or 12 days to complete the trip back to the breakout price (on average).

      In all cases, when a throwback or pullback occurs, performance suffers. To avoid a throwback or pullback, look for nearby support or resistance that is strong enough to turn price back. Good luck with that. I've not been able to predict whether a throwback or pullback will happen. I just assume they will and go from there. If they don't appear, I'm as happy as a kid with a bag full of candy on Halloween.

      You might try looking for overhead resistance or underlying support within 5% to 11% away from the pattern (those percentages are averages of how far price travels in 6 days, according to the table).

      Gaps. Sometimes a breakout day gap helps and sometimes not. Downward breakouts have results that are one percentage point apart, so they may not be statistically significant. Upward breakouts see better performance if a gap is absent. That's counter to normal trading wisdom. Other chart patterns see performance improve if a gap occurs.

      If you want to participate in a gap trade, know that I measured performance using the opening price the day after the gap, so you can buy a stock after it shows a gap and maybe you can participate in the better performance.

Description Bull Market, Up Breakout Bear Market, Up Breakout Bull Market, Down Breakout Bear Market, Down Breakout
Breakout direction 60% up 49% up 40% down 51% down
Performance of breakouts occurring near the 12‐month low (L), middle (M), or high (H) L 34%, M 46%, H 41% L 23%, M 26%, H 25% L –16%, M –14%, H –12% L –23%, M –22%, H –17%
Throwbacks/pullbacks occurrence 67% 64% 67% 67%
Average time to throwback/pullback peaks 5% in 7 days 7% in 6 days –6% in 6 days –11% in 7 days
Average time to throwback/pullback ends 12 days 11 days 11 days 12 days
Average rise/decline for patterns with throwbacks/pullbacks 38% 24% –13% –19%
Average rise/decline for patterns without throwbacks/pullbacks 48% 26% –14% –26%
Percentage price resumes trend 75% 69% 54% 49%
Performance with breakout day gap 38% 22% –14% –21%
Performance without breakout day gap 42% 26% –13% –22%
Average gap size $0.84 $0.35 $0.92 $0.63

      Height. In all cases, tall patterns see better post‐breakout performance than short ones.

Description Bull Market, Up Breakout Bear Market, Up Breakout Bull Market, Down Breakout Bear Market, Down Breakout
Tall pattern performance 46% 26% –16% –22%
Short pattern performance 36% 24% –12% –21%
Median height as a percentage of breakout price 10.6% 15.2% 10.9% 18.5%
Narrow pattern performance 39% 26% –13% –21%
Wide pattern performance 44% 24% –14% –22%
Median width 45 days 45 days 38 days 41 days
Short and narrow performance 38% 28% –11% –20%
Short and wide performance 35% 13% –11% –23%
Tall and wide performance 47% 29% –16%