Concept
Bat
Bat, also known as Alt Bat, is a Elliott & Harmonics concept. The Library holds 2 implementations, each one a working definition you can pull into Quant.
Top Bat indicators
2 total
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What is a Bat?
The Bat is an XABCD harmonic retracement pattern defined by Scott Carney in 2001, distinguished by a shallow midpoint and a deep completion: B retraces less than 0.618 of the XA leg (0.382 to 0.50 in the standard definition), C retraces 0.382 to 0.886 of AB, and D completes at the 0.886 retracement of XA, typically confluent with a 1.618 to 2.618 extension of BC. Like the Gartley, the Bat finishes inside the XA leg, so the X extreme caps the structure.
Carney later added the Alt Bat, which keeps an even shallower B (0.382 of XA or less) but completes beyond X at a 1.13 extension of XA. In both versions the D point is treated as a potential reversal zone where the move against XA is watched for a turn; decisive trade through the invalidation level voids the pattern rather than postponing it.
How traders use it
- As a deep-pullback entry: once B holds at or under 0.50 of XA, traders project the 0.886 level and wait for price to trade into it and show rejection before entering back in the XA direction.
- For tight, structural risk: because D at 0.886 sits close to X, stops beyond the X extreme are comparatively near the entry, with targets commonly staged at retracements of the AD swing.
- As a classification gate: pattern scanners measure the B retracement first, since it is the main separator between Bat and Gartley candidates, and only then project the matching D.
Bat vs neighboring harmonic patterns
Gartley: Both complete inside XA, but the ratios differ at both defining points: a 0.618 B with a 0.786 D makes a Gartley, while a 0.50-or-less B with a 0.886 D makes a Bat.
Crab: The Crab shares the shallow-to-moderate B but completes far beyond X at a 1.618 extension of XA, making it an extension pattern; the standard Bat completes inside XA at 0.886.
Related concepts · Harmonic patterns
Concept family
Elliott & Harmonics
33 concepts mapped · 17 in the Library
Bat FAQ
What is the difference between a Bat and a Gartley pattern?
The B and D ratios. A Gartley retraces about 0.618 of XA at B and completes at 0.786 of XA; a Bat retraces 0.50 or less at B and completes deeper, at 0.886. Both are XABCD retracement patterns finishing inside the XA leg, so in practice the B-point measurement is the deciding test.
What is an Alt Bat pattern?
A later Carney variant with a stricter B point, 0.382 of XA or less, that completes beyond the X extreme at a 1.13 extension of XA instead of the 0.886 retracement. It describes the case where a standard Bat's zone gets run before price turns, so invalidation and targets key off the 1.13 level rather than X itself.
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