Scanning & Backtesting Services Worth Noting (E.g. Free, Quality, etc.)

Another idea:
Poweroptions, at www.Poweropt.com is a unique service that allows you to screen stocks & options in a unique way, (one example: screening for stocks with biggest option volume and/or open interest and seeing for yourself if any correlation with the intraday price changes
No backtesting, not for free.
 
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