For a GTT buy order, the money is not blocked when the order is initially placed. Here's how it works:
- Placing GTT Buy Order: No money is blocked when you place the order.
 - Trigger Price Hit: When the trigger price is reached, the system checks your available balance.
 - Balance Check: If you have enough funds, the order will be executed.
 - Insufficient Funds: If your balance is insufficient, the order is rejected, and no money is blocked.
 - Order Execution: Money is blocked in your 'Stock F&O Balance' when the order is executed after the trigger price is hit.