For my intraday Stock Positions: I'm using the options data to find out the stocks to play with.
Not tested throughly, but have seen it working, and experimented on 1 or 2 trades.
Only Catch for this strategy is that stock should have liquidity and atleast few option strike prices active with decent volume.
Another strategy which i have used and made money : Volume Trend. If there is upmove in price coupled with 2X - 5X volume increase, price keeps going up irrespective of Nifty Trend.
How to identify stocks: I do not use amibroker or any technical analysis tools. I keep looking for calls from idiots on money rediff dot com, and then analyze the stocks using above two approaches.
Most of idiots recommending are incorrect about the timeframe, so pick cheeries, test them and keep watch, you will definetly taste sweet success