The "Bat pattern" incorporates the 0.886XA retracement, as the defining element in the Potential Reversal.
The B point retracement a 0.50 of the XA leg. The Bat utilizes a minimum 1.618BC projection which is already done.
In addition, Bat pattern is extended a 1.618 AB=CD calculation. It is an incredibly accurate pattern and requires a smaller stop loss than most patterns. Let's see, Nifty respect of BAT pattern of NOT.