Your are talking of FIX...
There is also FAST : FIX Adapted for STreamingSM (FAST ProtocolSM)
http://www.fixtradingcommunity.org/pg/structure/tech-specs/fast-protocol
I have no experience about that...
I don't know if SierraChart can manage that.

but I'm also interested into DTC
https://bitcointalk.org/index.php?topic=358612.0