I think he was looking for a PROP shop not a PRO. The advantages of a lot lower commission rates then retail - (depending on the product $3-4 lower) and the use of someone elses money so their is NO risk to you. I don't know all the ones in chicago but the couple that pop in my head are Transmarket and GHCO. I don't know where the offices are located there but at least it is a couple of places that you can look up. Transmarket does mostly spread trading and I don't know about GHCO.
