Butterfly, Bullish
3 min read
Core idea
The bullish butterfly is the mirror of the bearish version — a five-turn Fibonacci pattern (XABCD) that predicts an upward reversal at point D. Visually it resembles a big M with tall sides. Like all harmonic patterns, the value is in trading the price level of D rather than waiting for a breakout. Once D forms, price turns upward about 88% of the time, and the breakeven failure rate is among the lowest Bulkowski has ever measured — only 2.6% of bullish butterflies fail to rise more than 5% from D.
The Fibonacci ratios (mirrored)
- AB/AX ≈ 0.786 retrace
- CB/AB ≈ one of 0.382, 0.5, 0.618, 0.707, 0.786, 0.886
- CD/CB ≈ one of 1.618, 2.0, 2.24, 2.618 extension
- AD/AX ≈ 1.27 (within 3%)
Performance profile
Average rise after D is below the average for non-Fibonacci chart patterns, but the exceptionally low failure rate more than compensates if your strategy is short-term swing trading. In bear markets the failure rate is even lower — partly explained by a smaller sample size, but the data still suggest this pattern is unusually robust as a turning-point signal.
Why it matters
For a swing trader, the bullish butterfly is the most mechanically tradeable pattern in the harmonic family: a precise entry level (D), a precise stop level (just below D), and a precise probability (88% turn rate, 97.4% non-failure rate at 5%). You don't need to predict direction — the pattern predicts both direction and level. Sizing is straightforward; expectancy is positive in both market regimes.
Key takeaways
Mental model
Practical application
Trading the D turn long
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Software-detect. Manual harmonic identification is impractical. Use pattern-recognition software to project D from the X-A-B-C scaffold.
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Stage a limit order near D. Set a buy limit slightly above D (to ensure fill on the rejection) and a stop slightly below D.
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Enter on confirmation. A bullish reversal bar (hammer, engulfing, intraday reversal) at or near D is the trigger.
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Stop tight, just below D. A close below the low at D kills the pattern. The whole edge of harmonic trading is the precise invalidation level.
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Scale out at C, then A. Realistic targets are the most recent swing turning points — not the measure-rule projection. In bull markets, expect ~60% of trades to reach C; only ~39% to reach the A-top.
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Use position sizing to compensate for modest moves. Low failure rate + modest average rise = sized larger than aggressive-return patterns, with the same per-trade risk.
Why volume matters here
Example
A renewable-energy stock falls from $48 to $20 over five months. Pattern software flags a candidate bullish butterfly: X = $20 low, A = $29 high, B = $21.50 low (AB/AX ≈ 0.78 — qualifies), C = $26 high (CB/AB ≈ 0.62 — qualifies), D = $17.50 projected (CD/CB ≈ 1.65, AD/AX = 1.25 — both qualify within tolerance).
The trader stages a buy at $17.80 with a stop at $16.50. Two weeks later price prints a hammer at $17.40 and the trader fills at $17.85. A first profit target is set at C ($26), a second at A ($29). Six weeks later price reaches $25.60 — close to C — and the trader scales out half the position for a ~44% gain. The remainder runs to $27.50 before reversing; trailing stop exits at $26.30 for a ~47% gain on that half.
Total trade return: ~45% on roughly two months of holding — a textbook bullish-butterfly outcome, helped by the precise mechanical entry that harmonic patterns provide.
Related lessons
Related concepts
- Chart Patternlinked concept
- Harmonic Patternslinked concept
- Fibonacci Retracementslinked concept
- Reversal Patternslinked concept
- Swing Tradinglinked concept