Most of these scans are based on Japanese Candlestick patterns, which are good patterns for finding potential reversals. The other two -- "Weak, Overbought and Reversal Signs" and "Strong, Oversold and Reversal Signs" -- are their own combination scans. They require a certain grade (relative strength rating), overbought or oversold stochastic and either an NR7 or att least one reversal candlestick pattern.