Hi
@midhoo,
Bracket order functionality is designed in such a way that based on the order executions it considered as a separate order. If you want to square-off your all the pending orders for the particular scrip, use cancel all buy/sell order option available in DOM window.
You can place stop-loss or target order to an executed order/position by placing a counter order with the same order type. Ex - If you bought SBIN using Intraday Limit order then you need to punch Intraday Sell Stop or Stop Limit order.