How to identify stocks for trading intraday ?

I need help to identify easily, the scrips for trading intraday, out of stocks of NSE Futures, to be traded in cash market segment, purely for intraday trading.
Please guide me for easy search within first 15 minutes of trading, i.e. by 9.30 am ?
these are after hour jobs to search for stock, basically in intraday setup need to know about how many volumes are traded in a day (more than 10 lakh shares) is the best to check the price movements and also the entry and exit poll

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