Quote from 4Xprop:
We chose FXCM for the following reasons:
1. One of the largest FX firms in the world. This is important to us because since they are so large there is a good chance that interested traders are already trading there. Since we started 4XProp many of the traders already have accounts there so it was easy for them to start the process.
2. International presence. Few firms have the the same international reach that FXCM. They are regulated by all major regulators and offer support in 12 languages.
3. Sub Account capability/risk analysis tools. FXCM allows us to have separate sub accounts for our master prop trading account and superior risk analysis tools.
A lot of research went into selecting an FX firm. If you know of another firm that offers the above capabilities please PM us. Obviously we want to attract as many talented traders as possible so if we need multiple FX relationships we would explore that. (I would prefer this thread not turn into a thread about which FX firms are good or bad).
Many, many, many, many traders will NEVER trade with FXCM. Most have used them when they first started out and that firm has left nothing but a BAD taste in the mouth of we traders. FXCM is known to manipulate their price feeds (by widening the spread and not charging a commission is price manipulation, amongst other ways too) and has numerous complaints filed against them with the NFA:
http://www.nfa.futures.org/basicnet/Details.aspx?entityid=uy8vi7mVysc=&rn=N
I guess you can be commended for not going with Gain Capital, tho.