FIX engine integration
my two cents: 1. keep FIX (engine) outside of R (instances). 2. use rzmq/zeromq as middleware between the FIX engine and R (multi-instances): http://www.zeromq.org/ https://github.com/armstrtw/rzmq 3. use filtering per topic (symbol subscribe): http://www.zeromq.org/whitepapers:message-matching 4. You can use QuickFIX but a better option may be a fix8: http://fix8.org/ Best regards, Daniel