An order routed through SmartEx may have partial fills. Schwab will continue attempting to fill the order until it's completed.
For a Day Limit order, there is only one commission charge and generally one order number assigned unless you change your order, regardless of the number of fills it takes to complete the order.
Good 'Till Cancelled orders have the potential for multiple commissions if the order takes more than one day to complete. One commission will be charged for each day's combined fills, based on execution prices and quantities.
If you have Direct Access enabled for your account, it is your responsibility to make sure your order is filled to your satisfaction. Partially filled orders require a decision on your part to either enter an additional order for the remaining shares or not.
For Direct Access orders, there is always the potential that your order will not completely fill. As the default settings have a maximum value of 180 seconds for ECN orders, it is very possible not to complete an order in under three minutes, depending upon the symbol, market, and routing method. Commissions will be based upon the price and number of shares filled on each order. To change the Auto cancel timeout setting go to the Orders tab in the Settings > General window.
All orders and executions can be viewed in the Order Status tab of the Account Detail window or, if there was more than one fill, in the Order Detail window. This window can be accessed by double clicking on the order or by clicking on the order and going to Orders > Detail in the menu.
Placing a SmartEx Order
SmartEx Order Types