The Crab is a Harmonic pattern discovered by Scott Carney in 2001. The critical aspect of this pattern is the tight Potential Reversal Zone created by the 1.618 of the XA leg and an extreme (2.240, 2.618, 3.140, 3.618) projection of the BC leg but employs an 0.886 retracement at the B point unlike the regular version that utilizes a 0.382-0.618 at the mid-point. The Crab pattern requires a very small stop loss and usually volatile price action in the Potential Reversal Zone.
The Crab pattern can be toggled on or off by checking/unchecking the Show Crab? checkbox in the parameters dialog.
Here are some example Crab patterns found in NinjaTrader:
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The Terminal Bar is the price bar that reaches the minimum pattern completion requirements and will always be identified by the ☼ symbol. You can adjust the size via the Terminal Bar Font Size option in Settings.
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