most exchanges offer FAST connectivity. A lot of fx ECNs and brokers provide APIs that are faster than Fix.
Quote from luckybastard:
LOL. Then how do you send a routable order to nasdaq ?
If you're really convinced about this, then you should consider building and selling your own FIX engine. Currently the fastest commercial C# FIX engine is the Cheetah from "Rapid Addition", but their engine just sucks hairy balls compared to the average C++ engine.
