Your GTT order may get cancelled for the following reasons;
- After the expiry of 365 days, GTT order will be permanently cancelled.
- You have insufficient required margin in your Zerodha account.
- If GTT order is placed but limit price is not met, then GTT order will be cancelled.
- T-PIN authorization is not done to place sell GTT orders.
- In case of corporate events like bonus, dividend, share split etc, GTT order will be canceled a day before ex-date.