Forex glossary
Bat Pattern
Bat is an XABCD harmonic pattern with D at an 88.6% retracement of XA and B shallower than a 61.8% XA retracement. Other leg ratios help define a potential reaction zone. Those measurements alone do not establish reversal or a fixed stop distance.
Illustrative example
How does it work in practice?
Assume a bullish candidate with X at 100, A at 110 and D at 101.14, an 88.6% XA retracement. B at 105 fits one requirement, but the remaining legs still need checking.
A case to work through
Checking B and D
Hypothetically, X=200, A=220, B=212 and D=202.28.
- B retraces 8/20=40% of XA; D retraces 17.72/20=88.6%.
- These fit the basic Bat candidate levels; C and CD relationships still need checking.
What follows? Keep it a candidate until the entire structure has been checked.
Example boundary: Matching levels does not confirm a reaction or trading effectiveness.
A useful distinction
Bat Pattern / Gartley Pattern
Bat uses a shallow B and D at 88.6% XA; Gartley has characteristic B at 61.8% and D at 78.6%.
Check your understanding
Calculate two separate retracements of XA.
Show the answer and explanation
88.6%
(120−102.28)/(120−100)×100=88.6%.
Anchors, ratios and rules
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Related terms
Sources and documentation
- Harmonic Trader – Bat
The author's 0.886 XA completion and Bat ratio criteria.
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