Once your legs are grouped into a complex position, you can simply right click the position in your portfolio window and choose "Close."
To close a combo in one click within TWS you must first ensure that the position was opened as a combo (if you "leg" into a combo position it cannot be closed with one click). Once you have traded into a combo you can group that combo into a complex position within your Portfolio window.
To group your combo into a complex position
- From the Mosaic File menu select Global Configuration > Display > Ticker Row.
- Scroll down the page and select "Group legs into complex positions."
- Click OK.
Find out more in the TWS Users' Guide.