Technical Definition
The Crab Pattern is a harmonic reversal pattern designed to identify very deep and extreme reversal zones, where price extends significantly beyond the original impulse move. It is characterized by a shallow retracement followed by an aggressive extension, with the pattern completing near the 161.8% Fibonacci extension of the XA leg. This extreme extension often marks strong exhaustion and a high-probability reversal area when confirmed.
It is the most extreme pattern. The price runs way past the highs or lows (161.8% extension), tricking everyone into thinking it is a breakout, then snaps back hard.
Extreme price extensions often signal exhaustion
Market Psychology
Confidence
The XA leg reflects strong conviction and broad participation.
Limited Pullback
AB shows weak counter-trend pressure. Trend beliefs remain strong.
Acceleration
BC and early CD attract momentum traders and breakout participants.
Extreme / Exhaustion
Near 161.8% extension, fear or greed peaks. Smart money exits as latecomers get trapped.
Pattern Anatomy
XA Leg (Impulse)
Strong directional move establishing the trend foundation.
AB Leg (Retracement)
Shallow retracement (38.2% - 61.8% of XA).
BC Leg (Correction)
Price retraces 38.2% to 88.6% of AB.
CD Leg (Extension)
Extreme extension to 161.8% of XA. Voaltile completion.
Pattern Rules
XA
Identify a clear impulse leg.
AB
AB retracement should be shallow (38.2%–61.8% of XA).
BC
BC retracement 38.2% to 88.6% of AB.
CD
CD must extend close to 161.8% of XA.
Extreme
The 161.8% extension is the defining characteristic.
Tactical Execution
Enter at D (1.618 extension)
Stop loss beyond 1.618
Target 0.382 of AD
Signal Confirmation
- Strong rejection candles at PRZ (161.8% Ext)
- Momentum divergence (RSI) is almost mandatory
- Volume spike followed by rejection
- Structural break after reversal