Yep most of the FIX connections I've seen are connected for most of the day, long outside trading hours. Tag 103 has specific error codes for the exchange being closed.
I didn't believe from beginning on that FIX was fictional, since if it's a real protocol (or at least very near to a real protocol) it makes programmers that are good at Stockfighter a lot more placeable in the market - and this is what Starfighter wants to make money with.
