A limit if touched order is designed to buy (or sell) a contract below (or above) the market, at the limit price or better. The Aux. Price value is the trigger to submit the limit order at the specified limit price.
To create a Limit if Touched order
Click the Ask price to create a BUY order, or the Bid price to create a SELL order.
In the Type field select LIT as the order type.
In the Lmt Price field, enter the price at which you want the order to execute.
In the Aux. Price field, enter the "touched" price to trigger the order.
To transmit the order, click the "T" in the Status field.
For a more detailed description of Limit if Touched orders and the products and exchanges on which they're supported, visit the Order Typesinformation page.