Butterfly

What is the Butterfly harmonic pattern?

The Butterfly is a 5-point harmonic reversal pattern (X-A-B-C-D) where point D overshoots the origin X at the 1.272 Fibonacci extension of the XA leg. Unlike the Gartley (D inside XA) or the Bat (D at 0.886 XA), the Butterfly’s defining feature is overshoot — it catches exhaustion reversals at swing highs and lows, not retracements. Bryce Gilmore identified it in the 1990s using Fibonacci and Gann confluence, and Scott Carney formalized the 1.272 completion in his 2004 book Harmonic Trading.

The pattern’s edge is asymmetric risk. Because the stop sits just beyond 1.618 XA — a tight structural invalidation — and targets sit at 0.382 and 0.618 of the AD leg, traders routinely book 3:1 to 5:1 reward-to-risk when the setup completes cleanly.

Exact Fibonacci Ratios (the only thing that matters)

The Butterfly invalidates if any of these ratios fall outside tolerance:

• AB = 0.786 of XA (tolerance ±0.02) — this is the single most important filter
• BC = 0.382 to 0.886 of AB
• CD = 1.618 to 2.24 of BC
• D = 1.272 of XA (sometimes 1.618) — beyond point X

If AB is 0.618, you are looking at a Gartley, not a Butterfly. If D lands at 0.886 XA, it is a Bat. Respecting the 0.786 AB filter alone will eliminate roughly two-thirds of false positives flagged by auto-detection scanners.

Worked Example: Bearish Butterfly on SPY 4H

This is the kind of setup you should journal in full detail.

• X = $450.00 (swing low)
• A = $470.00 (swing high, XA up-leg = $20)
• B = $454.28 (0.786 retracement of XA)
• C = $465.00 (0.618 of AB)
• D = $475.44 (1.272 XA extension, above X)

Price rallies into $475.44 and prints a bearish engulfing candle with RSI showing bearish divergence vs the A-leg. The confirmation close completes at $475.

Entry (short): $475.00 on the close of the engulfing candle. Stop-loss: $482.36 (1.618 XA) — risk of $7.36 per share, roughly 1.5% of price. Target 1 (0.382 AD): $465.74 — reward $9.26, R:R 1.26:1 — scale out 50%. Target 2 (0.618 AD): $459.71 — R:R 2.1:1 — scale out 30%. Target 3 (point B): $454.28 — R:R 2.8:1 — trail the final 20%.

Position sizing on a $25,000 account risking 1% ($250): $250 ÷ $7.36 = 33 shares. If D wicks to $477 intrabar but closes at $475, the setup remains valid because the 1.272 is a zone (±0.5%), not a single price.

Entry Rules (confirmation, not blind limits)

Most losing harmonic trades come from one mistake: placing a limit order at 1.272 XA and hoping. Price routinely pierces the level by 0.3–0.5% before reversing, and a blind limit gets filled right before the final overshoot.

The disciplined sequence is:

1. Mark the 1.272 XA zone with ±0.5% tolerance.
2. Wait for price to reach the zone and print a confirmation candle (engulfing, pin bar, or RSI divergence vs the A-leg).
3. Enter on the close of the confirmation candle.
4. Place the stop just beyond 1.618 XA — the next structural invalidation.

If no confirmation prints within the zone and price keeps going, skip the trade. The Crab pattern (1.618 XA completion) is the Butterfly’s extreme cousin and may form next — but that is a different setup with a different stop.

Why Butterflies Fail

Three failure modes dominate journal reviews:

1. Strong trend context. Butterflies are exhaustion patterns. In a parabolic move, 1.272 XA is just another milestone on the way to 1.618 and beyond. Before entering, check the higher timeframe — if it is impulsive, stand aside.
2. Measurement error on XA. Harmonic software picks highs and lows from wicks, but many traders draw XA from closes. Mixing the two conventions produces a false 0.786 AB retracement. Pick one convention and lock it in your journal.
3. Entering without D-confirmation. The 1.272 is a zone, not a price. Blind limit orders at the exact level get filled on overshoots and stopped at 1.618 XA for a full-risk loss.

How to Journal a Butterfly

Grade every setup A or B based on ratio precision, and log the actual outcome:

• Record the exact Fib ratios at A, B, C, D (to four decimal places).
• Mark the setup A-grade if every ratio is within ±0.01 of ideal, B-grade if within ±0.03.
• Log the D confirmation signal used: engulfing, pin bar, RSI divergence, or none.
• Track planned R:R vs realized R:R on every trade to catch early-exit bias.
• Note the higher-timeframe context: ranging, exhausted, or impulsive.

After 20–30 logged Butterflies you will see clearly which ratio combinations and which confirmation signals produce your best results — and which grade-B setups you should stop taking.

How JournalPlus Helps

JournalPlus lets you tag trades with custom fields for XA direction, each Fib ratio achieved, D confirmation type, and setup grade, then filter performance by any combination. That turns “I think my A-grade Butterflies do better” into a real number you can trust.