The Good till triggered (GTT) feature works like an order that is active until the trigger condition is met. This trigger will be valid for 1 year, so anytime the price condition within this period is met, your order will be placed and executed, provided there are enough funds in the trading account, and your limit price order is filled on the exchange. This trigger set is valid only once, so if the order is placed and not executed for any reason, the GTT has to be placed again.
Single trigger- You can place a single trigger where the order is placed at the exchange when the trigger price matches or breaches the LTP. The single trigger can be used to enter into new positions or exit existing positions.