order placement

I am planning to do intraday trading, Place order and forgot style since i am planning to follow systematic trade. Once I place the order, I am not going to modify it as long as the reason for entering the trade is not violated. For this I need to place order with price to buy/sell, target...

Does any one know stock broker or trading platform or software that allows placement of two orders linked to each other: 1. stop loss order and 2. target order. On execution of any one order, the other order gets cancelled automatically. Margin is not blocked as the linked orders aim to square...