Harmonic patterns predate Smart Money Concepts but are frequently used alongside it. They rely on precise Fibonacci ratios between five swing points, labeled X, A, B, C, and D, to identify a Potential Reversal Zone where a trade can be planned in advance.
The XABCD Structure
Every harmonic pattern is built from four price legs: XA, AB, BC, and CD. Each leg must retrace or extend the previous one by a specific Fibonacci ratio. The pattern is only considered valid if all the ratios fall within their defined tolerance.
The Gartley Pattern
- ▸Point B retraces roughly 61.8% of the XA leg.
- ▸Point C retraces between 38.2% and 88.6% of the AB leg.
- ▸Point D sits at roughly 78.6% retracement of the XA leg, forming the Potential Reversal Zone.
The Bat Pattern
- ▸Point B retraces between 38.2% and 50% of the XA leg — shallower than the Gartley.
- ▸Point C retraces between 38.2% and 88.6% of the AB leg, similar to the Gartley.
- ▸Point D sits at roughly 88.6% retracement of the XA leg — deeper than the Gartley's 78.6%.
Both patterns exist in bullish form (predicting a reversal up at point D) and bearish form (predicting a reversal down at point D), mirrored versions of the same ratio structure.
Steps to Trade a Harmonic Pattern
- 1.Identify a clear XA leg — a strong, obvious price swing.
- 2.Measure the B, C, and D retracement ratios using a Fibonacci tool.
- 3.Confirm the ratios match a known pattern (Gartley, Bat, or others) within tolerance.
- 4.Wait for price to reach the Potential Reversal Zone and look for a confirmation signal before entering.
Reaching the Potential Reversal Zone is not itself a signal. Wait for a structural shift, a rejection candle, or another confluence signal before committing to a trade.
Combining Harmonics with SMC
Many traders overlay harmonic patterns with SMC concepts: if a Gartley's Potential Reversal Zone lines up with a higher-timeframe order block or a discount zone, the combined confluence is far stronger than either tool used alone.