A. Here is a short list recommended by Barron's:
iViewMarkets: free, it provides real time market information and tools to rate the prospects of 10,000 U.S.-based stocks and funds.
Chartlabpro: it is a paid site with the same founder as iViewMarkets.
Chaikin Analytics: it has a stock screener that could be used to create a short list of potential trades through use of convention and Chaikin-originated criteria. $1,950 per year service charge.