The Deep Crab chart pattern is very similar to the standard crab pattern in terms of the formation and structure of the pattern. However, one difference between the bearish and bullish deep crab pattern and the crab pattern is the B retracement ratio.

While the B retracement ratio in regular crab patterns lies between 0.382% to 0.618%, but the B retracement level in the deep crab pattern must be at the 0.886% of Fibonacci ratio. 

The Deep Crab pattern can be a rare occurrence and therefore looking for the setup as outlined by the exact rules could mean that traders may have to filter aggressively to find the right pattern to trade.