Harmonic Patterns

Harmonic trading is a price-action framework that uses Fibonacci retracements and extensions to define where a trend leg is likely to exhaust and reverse. Instead of treating every swing pattern equally, harmonic traders care about whether each leg respects a specific ratio structure.

• X to A defines the initial impulse.
• A to B is the first retracement.
• B to C is the counter move.
• C to D completes the setup and creates the potential reversal zone, or PRZ.

Most harmonic patterns are built from the same ratio toolbox. The difference between a Gartley, Bat, Butterfly, or Crab is not the number of points, but how far each retracement and extension travels.

• Common retracements: 38.2%, 50%, 61.8%, 78.6%, 88.6%
• Common extensions: 127.2%, 141.4%, 161.8%, 200%, 224%, 261.8%
• The strongest PRZs usually combine more than one Fibonacci condition in the same area.

The core family includes Gartley, Bat, Alternate Bat, Butterfly, Crab, Deep Crab, Cypher, and Shark. All follow the same XABCD template, but the ratio profile changes the type of reversal you are looking for.

• Gartley: the classic 61.8% AB retracement with a 78.6% XA completion zone.
• Bat: shallower B-point than a Gartley and a deeper 88.6% XA completion.
• Alternate Bat: a Bat variation with a more extended D-point, often useful when the standard Bat is too conservative.
• Butterfly: a deeper reversal pattern that often extends beyond X.
• Crab and Deep Crab: the most extended structures, often appearing near exhaustion extremes.
• Cypher: a fast-moving pattern with an extended BC leg and a 78.6% XA completion.
• Shark: a more aggressive reversal structure that can show up before larger trend changes.

Most traders build the trade around the PRZ, then wait for proof that price is reacting there. Confirmation can come from rejection candles, divergence, or a clean shift in lower-timeframe structure.

• Entry: around the D-point only after the PRZ starts holding.
• Stop: beyond the PRZ invalidation area, not randomly inside it.
• Targets: often based on retracements of the CD leg such as 38.2%, 61.8%, 100%, or 161.8%.
• If price slices through the PRZ with momentum, the invalidation matters more than the pattern label.

Advanced harmonic study often includes 3-Drives, White Swan, and Black Swan variations. Those patterns can be useful, but they are harder to detect consistently and usually need stricter context filters than the primary XABCD family.

In practice, most traders get more value from learning the core patterns well than from collecting every exotic variation. Precision, confirmation, and risk management matter more than pattern quantity.