Zerotha is a discount broker and intraday trader like zerotha very much as I also belongs one of them. if you want a broker then you should know about history of that broker, margins and most impotent brokerage. all this criteria fits for zerotha. I am a certified investment analyst. as per my opinion if you know technical analysis very well or you have a unbeatable trading plan only then you should go for intraday trading, and zerotha may be one of the best one for you.