Yes, trading one vs more than one is just a personal comfort label. There are many good stocks, which are intraday candidate even if u decide to just watch and trade one.. like - AXISBANK, SBIN, YESBANK from banks, TATASTEEL, HINDALCO, VEDL from metals, RELCAPITAL, LICHSGFIN from fin & service, RELIANCE from energy etc... just run through any of their's past one month intraday chart if u want to change your instrument.