If the order has not been filled yet (Active status), it is still possible to cancel it.

If you wish to cancel the order, go to Activity section. 

As an option, you can cancel only a particular active order by clicking Cancel order button on the right of the desired order:

As a result, the status of your cancelled orders will be changed from "Active" to "Cancelled":

⚠️ All completed transactions of any kind on the platform are final and irreversible.