Based on Bill Williams' First Wise Man. Bull candles are marked with purple and Bear candles with blue.
Requirements: - Candle height must be greater than ATR (filter out tiny Doji candles) - Open and Close must be beyond the HL2 (midpoint) for either Bull or Bear scenarios - Candle HL2 must be more than 1x ATR from the Alligator Jaw (13-period SMMA, pushed forward 8 periods). The dark blue line in my example. - ATR is calculated using a 13-period RMA of the true range