Cancel a single order
Open Portfolio
Go to /portfolio and switch to the Open Orders tab.
Find your order
Use search/sort if needed and locate the active limit order.
Cancel
Click Cancel on the order row.
Cancel all open orders
If available for your account, use the Cancel all action in the Open Orders tab to remove all active orders for your wallet.
Cancellation only affects unfilled quantity. Already-filled portions remain in your position history.