My friend just returned from the US and plans to day trade full-time NSE/MCX with a Rs 1 cr account (100 lac inr). I've been in this business a while but it is hard to figure out what broker will do proper justice to that kind of money in one account, in terms of safety of money first and proper execution, transaction charges, reporting, etc etc second. Any thoughts? Zerodha, maybe but they have a lot of frustrating system bugs. Looking at other possible candidate brokers. The so-called HNI brokers with x.x % turnover charges maybe not suitable for day trading with multiple trades a day, I assume.