Actually I am shocked that there is no explanation given that spreads are regularly traded by ppl according to the posts here on Reddit. I have the same problem. Every solution I found either just talks about a single order or the dialogues mentioned don't exist in TWS. Needless to say that IB isn't offering any simple how-to on this either.


I would love to hear if you figure this out. For the moment, I’ve just been setting it up on the short leg. I have to admit the IBKR signage and terminology still gets me tripped up.