for cheapest brokrage go with rkglobal(rs 999 per month 4 unlimited equity and rs 9 per lot in f& o) for negotiable brokrage(for trade tiger a/c it may be .015 for and .15 for delivary without any prepaid ya negotiate ur rm) and best sofware(trade tiger eod charting ,iday charting, u can save ur chart template, most of important indicator is there) no software fee for trade tiger.u can also trade in classic mode ( like icici direct web page) and fast trade (java and flash based plateform) no charge for dial and trade toll free no 1800 22 7500.fullfill security measures and dial and trade executive wil trade and give u good tips for intraday and short term.for margin exposure(time relaxibility) go with kotak(ofline).their tips is also good and come on ur cell as sms.u also negotiate brokrage in kotak.