daily volatality of stocks can be seen in the below mentioned link of nse. take stocks with high volatality, but at the same time the chart for last couple of days must be trending with only one or two entry triggers as per the method you follow. also check that their open interest is high with high volumes, thus after selecting the stocks, trade when your method triggers entry in the direction of the market.
http://www.nse-india.com/content/nsccl/FOVOLT.csv
http://www.nse-india.com/content/nsccl/FOVOLT.csv