Crab

A moderate B (38.2–61.8% of XA) followed by a long extension: D completes at about 161.8% of XA, well beyond 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 #4).

BC/AB between 0.5 and 0.886 (lower bound is the min C retracement input, no tolerance) (line 412)
AB/XA between 0.382 and 0.618 (line 419)
AD/XA ≈ 1.618 (line 419)
C not beyond A (line 411)
D beyond X (line 419)

How it exits

D extends well below X, so the stop sits 1% under D. 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 Crab 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	565	3.4%	44.1%	+0.11 (+0.01 to +0.22)	1.20	313 / 56 / 185 / 4
1-hour	336	2.5%	44.9%	+0.16 (+0.03 to +0.30)	1.30	182 / 31 / 116 / 4
4-hour	98	2.5%	52.0%	+0.30 (+0.05 to +0.55)	1.64	46 / 13 / 38 / 0
Daily	28	1.3%	46.4%	+0.21 (-0.25 to +0.67)	1.38	15 / 2 / 11 / 0

Year by year (mean R)

Year	15-minute	1-hour	4-hour	Daily
2016	—	+0.53 n=34	+0.43 n=7	+1.06 n=4
2017	—	+0.61 n=24	+1.04 n=6	-0.08 n=6
2018	—	+0.02 n=26	-0.04 n=14	-0.42 n=3
2019	—	+0.17 n=23	+0.52 n=12	+0.38 n=2
2020	—	-0.29 n=39	-0.42 n=3	+0.38 n=2
2021	—	+0.31 n=31	+0.75 n=11	—
2022	—	+0.01 n=34	+0.18 n=7	+0.12 n=4
2023	+0.22 n=84	+0.12 n=43	+0.01 n=17	-0.31 n=4
2024	+0.04 n=172	+0.18 n=34	+0.12 n=4	+1.75 n=2
2025	+0.31 n=176	+0.39 n=25	+0.00 n=10	-1.00 n=1
2026	-0.13 n=133	-0.08 n=23	+0.82 n=7	—

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.