Gartley

The classic harmonic pattern, described by H.M. Gartley in 1935. After the XA leg, price pulls back to about 61.8% at B, bounces to C without passing A, then completes at D, a 78.6% retracement of XA, still above X.

Idealised bullish shape. The strategy only trades bullish patterns.

The rule, exactly as coded

From classifyStrictSymmetrical in harmonic_master_ledger_quant.pine (commit adaa8cb). Ratios are distances between points; "≈" means within ±6% of the value. Patterns are checked in order and the first match wins (this is #1).

BC/AB between 0.5 and 0.886 (lower bound is the min C retracement input, no tolerance) (line 412)
AB/XA ≈ 0.618 (line 413)
AD/XA ≈ 0.786 (line 413)
C not beyond A (line 411)
D not beyond X (line 413)

How it exits

D completes above X, so the stop sits 1% under X: a relatively wide stop. Half the position takes profit at 1.5R, the stop on the rest moves to entry, and it runs to 2R (3R if D sits on the monthly Camarilla S3). How the exits work, and what we tested →

Results by timeframe

Every Gartley the script found across about 500 stocks, no hand-picking and no filters. R is the gain or loss as a multiple of the amount risked; a setup is two equal halves, so its outcome is −1, +0.75, +1.75 or +2.25. The 95% range is clustered by instrument.

Timeframe	Setups	Share of TF	Win rate	Mean R (95% range)	Profit factor	−1 / +0.75 / +1.75 / +2.25
15-minute	512	3.1%	41.0%	+0.05 (-0.05 to +0.16)	1.09	292 / 42 / 162 / 2
1-hour	441	3.3%	44.4%	+0.14 (+0.02 to +0.25)	1.25	242 / 41 / 151 / 3
4-hour	125	3.1%	56.8%	+0.49 (+0.26 to +0.72)	2.17	52 / 10 / 52 / 7
Daily	71	3.4%	49.3%	+0.31 (+0.00 to +0.63)	1.62	36 / 3 / 32 / 0

Year by year (mean R)

Year	15-minute	1-hour	4-hour	Daily
2016	—	+0.05 n=42	+1.12 n=8	+0.83 n=6
2017	—	+0.61 n=42	+0.58 n=15	+1.36 n=7
2018	—	-0.20 n=32	-0.27 n=13	-1.00 n=5
2019	—	+0.32 n=38	+0.75 n=11	+0.10 n=10
2020	—	-0.08 n=36	+0.61 n=11	+1.58 n=6
2021	—	-0.04 n=50	+0.82 n=10	-0.31 n=8
2022	—	+0.06 n=45	+0.00 n=14	-0.61 n=7
2023	+0.21 n=69	+0.01 n=40	+1.19 n=9	+1.28 n=8
2024	+0.10 n=156	+0.46 n=35	+0.69 n=13	+0.67 n=6
2025	-0.04 n=165	+0.27 n=51	+0.42 n=9	-0.54 n=6
2026	+0.03 n=122	-0.04 n=30	+0.06 n=12	-1.00 n=2

Backtests on today's Nasdaq-100 / S&P 500 members (survivorship bias), TradingView Strategy Tester, 0.01% commission, no slippage, all entry filters off. Education and research only — not financial advice.