I have used many of the broker such as, mansukh, trustline, zerodha but I find the Zerodha is doing 100% fair business and charging only rs 20 brokerage for large orders, also it is 100% online broker which help the traders to act instantly, and help them to make money, also they provide bracket orders which has the function of trailing stop loss with stop loss and target orders placed with a single order.I personally recommend every trader to join them.