Click on the Trade tab at the bottom left are of the MT4 platform. There, you will find all of your trades, including their entry prices, position sizes, stop losses, and profit targets.
Right-click on the trade that you want to delete and select the “Modify or Delete Order” option.
Select "Delete Order”
Pending orders can also be deleted automatically at the time that has been given in the "Expiry" field. When a pending order has been deleted, the corresponding record will appear in the "Terminal – Account History" window