Use the Strategy Builder to easily build complex, multi-leg strategies using the option chain display. Create strategies manually using the calls/puts in Tab or List View. Create Horizontal, Vertical or Diagonal spreads using the Spread Builder layout. You can open Strategy Builder from the Advanced Options Tools section of the New Window dropdown, or by toggling on the Strategy Builder button at the bottom of the Option Chain window…

Although you cannot add a leg to an active order to make it a combo, you can build a combo in many different ways within TWS. The easiest way to create an option combo is by utilizing the Strategy Builder tool.

Mosaic:…

In Classic TWS or Mosaic, right click on any option or future option symbol in the Financial Instrument field and left click on the "Strategy" button. This will open the window to build an order for a Complex Position. In the upper left portion of the window you will have a choice to display "Calls and Puts" to build your own spread or display predefined Complex Positions. In the drop down menu will be choices for predefined "Horizontal Spread" (Calendar), "Vertical Spread" or "Diagonal Spread"…

Use Spread Templates within the Option Chain to easily compare and create multi-leg option strategies:

1. From the Option Chain "blade" (to the right of the symbol), click Calls and Puts, then select a Spread Template (Horizontal Spread,…