Will S

To sidetrack, does anyone know if it's possible to use a shortcut key to mark horizontal trend line in IB? I find it really troublesome to have to click select the function every single time I have to draw a line.

The only way I know to close partial positions is by using this function called "Reverse Position". You have no way of setting it as a specific type of order (market, limit, etc), so I'm not really sure what it uses. But you are able to set a specific percentage of position that you want to close. For example; 50 - close all 25 - close 50% 12.5 - close 25% Yes I have no idea why, but it works like that. Try and see if it differs from mine. Perhaps there is a better way to do this?