What it means
The Bat pattern is a harmonic variation with tighter Fibonacci ratios than the Gartley. AB retraces 0.382 to 0.50 of XA (smaller than Gartley's 0.618). CD reaches 0.886 of XA (vs Gartley's 0.786). Discovered by Scott Carney in 2001. The tighter D-point retracement makes Bat patterns trade with tighter stops and more aggressive reversal targets.
Why it matters
Bat patterns have one of the highest reaction rates among harmonics (~70%+ per Carney's backtest data). The strict ratios produce a smaller set of valid setups, which improves signal quality at the cost of frequency.
How to use it
Identify Bat with all four ratios within tolerance. Enter at D point in direction of XA reversal. Stop just beyond X (typically tighter than Gartley stops). Target 0.382, 0.618, and 1.27 of CD.
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