See chart for details.
Ideal Bat Criteria:
XA is pattern's longest leg.
AB retraces to 0.383 - 0.5 of the XA leg.
BC retraces between 0.382 and 0.886 of the AB leg.
CD is ideally equal to AB in price and time, but typically extends to the of the BC leg. D often occurs between the 1.618 and 2.618 extension of BC .