Modify an Order
You can modify parameters for any order that hasn't executed.
Modify an order
From the Orders screen, click Modify in the appropriate contract description line.
In the Modify Order box, change any order parameters, including
Quantity
Price
Order Attributes (Discretionary, Trailing Stop, Bracket)
Note that you cannot make changes to the Fill Outside Regular Trading Hours setting when you modify an order.
Preview or Place the modified order.
NOTE: Use Revert to go back to the original order parameters prior to placing the modified order. Use Cancel to cancel the current order.