You can cancel a one-off buy order up until your funds have cleared.

To cancel your order, click the 'I want to' button and then select 'View my transaction history'. We'll then show you a list of your pending orders.

Select the order you wish to cancel.

If it's eligible for cancellation, a 'Cancel order' button will show, and you can click this button and confirm.

You can also access your pending orders from the dashboard, by clicking on ‘Pending US Investing orders’.

Once a one-off buy order is placed, it can't be changed.

However, you can cancel the order up until your funds have cleared. You can then submit a new buy order with your changes.