Sending & Receiving Messages

After your session is logged on, you can send standard FIX flows and inspect FIXSIM responses.

Example: New Order Single

Sample FIX 4.4 New Order Single:

8=FIX.4.4|35=D|55=AAPL|54=1|38=100|40=2|60=20250214-12:00:00|

Typical FIXSIM Execution Reports:

35=8 ExecType=0 OrdStatus=0  (Ack)
35=8 ExecType=F OrdStatus=2  (Fill)

Using the FIXSIM portal

• View inbound and outbound message logs per session.
• Filter by message type, symbol, or time window.
• Inspect full tag/value details for any message.