Please note that you can only cancel orders that haven’t yet been filled. To do so:
- From the overview page of the stock for which you placed an order, tap on the order under Upcoming Activity;
- From the next page, tap on Cancel order.
The status of your order should then pass from accepted to cancelled.
Disclaimer: There is a chance that you click cancel on a resting order but it is still executed as a trade. There is a very slight delay in sending the cancel to the exchange, during which your order could still be executed. The longer you have the order screen open before clicking cancel, the greater the chance of this happening, as the order status is not updated live while you are on the order screen.