Forex glossary
Gartley Pattern
Gartley is an XABCD harmonic structure with B at a 61.8% XA retracement and D at a 78.6% XA retracement. Remaining legs must fit the chosen ratios, including AB=CD relationships. In a bullish version, an upward reaction from D would align with the original XA direction.
Illustrative example
How does it work in practice?
Assume X is 100 and A is 110: B lies at 103.82 and D at 102.14. A possible rise from D would align with the initial XA move; other legs still require validation.
A case to work through
Two XA percentages
Hypothetically, X=30 and A=50, so XA spans 20.
- B at 61.8% is 50−12.36=37.64.
- D at 78.6% is 50−15.72=34.28.
What follows? Record B and D without swapping their percentages.
Example boundary: Two levels are insufficient to validate the full XABCD structure.
A useful distinction
Gartley Pattern / Bat Pattern
Gartley has B at 61.8% and D at 78.6%; Bat uses a shallower B and D at 88.6%.
Check your understanding
Locate two different retracement levels of the same leg.
Show the answer and explanation
107.64
120−0.618×20=107.64.
Anchors, ratios and rules
Step 5 / 10 · 0 / 10 reviewed
View the full sequence →Progress is saved only in this browser.
Read the fuller explanation
Related terms
Sources and documentation
- Harmonic Trader – Gartley
The author's B=0.618 XA and D=0.786 XA criteria and remaining leg checks.
Document read:
The example illustrates the mechanism. Check current account conditions and instrument specifications with the provider.