No, nothing shows shorting activity. The best you can do is to watch the stocks closely if you have real time quotes with continuous bid/ask sizes. Once you get familiar with a number of stocks and their daily trading patterns, you can watch for shorting. Other than that, there is no way.
No, shorting activity is impossible to detect since "a sell is a sell". The only definitive data is over a month old...not much help in making trading decisions.
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