Price didn’t reach your specified level: Pending orders only trigger when the market price hits the price you set.

Insufficient margin: Your account may not have enough free margin to open the position when the order is triggered.

Minimum distance (Stop Level) not met: For some instruments, pending orders must be placed a certain number of points/pips away from the current market price.

Trading hours or market closure: The instrument may be outside its active trading hours when the order was supposed to trigger.

Order expiration: If you set a time limit or expiration for the pending order, it may have expired before execution.