The key characteristics used to identify the Harmonic Crab pattern are as follows:
AB leg can retrace anywhere between 38.2% up to 88.6% BC can retrace 38.2% – 88.6% of AB leg CD is an extension of up to 161.8% of XA leg and is also an extension of 224% – 316% of the AB leg After the crab pattern is established, traders can take their positions at or from point D (at the high or at the low of the price bar at D) targeting 61.8% and 127.2% of CD leg.