Message Format

FIX messages are ASCII formatted. The member will be provided with a SenderCompId and SenderSubId that must be sent on every message. The TargetCompId for all messages the member sends is based on the destination exchange as follows.

Destination Exchange	TargetCompID
BYX Exchange	BYXX
BZX Exchange	BATS
EDGA Exchange	EDGA
EDGX Exchange	EDGX

All messages the member receives will have the Sender and Target fields swapped.