To modify or delete a pending order that you have placed, click on the ‘Orders’ tab in the ‘Trade Watch’ window.
This will present all your pending orders.
You can 'Modify' by clicking the button or cancel the order by clicking the red X button.
If you click on ‘Modify’, your pending order will be displayed in 'Trade ticket' and you will be able to set new parameters to this order.
If you click on ‘Cancel’, your order will be automatically removed from the list.