Scan my 300 stock watchlist for high prob Swings.

I want to scan my 300+ symbol watchlist (of stocks that move well) for high probability swing stocks.  My ideal swing moves in one direction (up or down) for 3 days to 3 weeks.  I want to scan the Daily timeframe for average number of reversals.  The goal is to avoid stocks that are in chop.   I want to scan my list for average number of reversals over a configurable time period (30, 60 or 90 days).  I need to find optionable stocks that tend to move from a minimum of 3 days to 3 weeks?  If this scan could also work on Weekly and Monthly time frames, that would also be useful.  Any suggestions are greatly appreciated.