FIX Protocol & Matching Engine

Inspect ASCII FIX framing, simulate Price-Time priority matching, and decode ITCH binary streams.

Symbol:

Side (Tag 54):

Limit Price (Tag 44): $150.50

Quantity (Tag 38): 100

8=FIX.4.2|9=000|35=D|49=TRADER_A|56=EXCHANGE|34=104|52=20260827-14:30:00.123|11=ORD_1001|55=AAPL|54=1|38=100|40=2|44=150.50|10=112|

Tag 8 (BeginString)

FIX.4.2

Tag 35 (MsgType)

D (New Order Single)

Tag 34 (MsgSeqNum)

104

Tag 10 (CheckSum)

112 (mod 256)