Last minute issues with the clicking on start, will be up in a bit, you can take your time and start it.
Questions on how to calculate profitability etc, is already asked and answered here:
http://zerodha.com/z-connect/blog/view/start-the-zerodha-60-day-challenge
@ cinder, a person who has traded only once in 60 trading days, can't really be looking to be a professional trader, right??
..
But yes, the idea is to push our clients to stay profitable, which I guess people forget is why we are in the business and not just to trade..