Session versus instrument state
A connected FIX session does not establish that every CFD subscription is healthy. Monitor requested symbols, subscription responses and the age of each bid/ask independently from session heartbeats.
Market data · deployment planning
CFD FIX Market Data
Scope a FIX market-data session for CFDs around the instrument dictionary and message behavior agreed by both parties.
Price message contract
Confirm the FIX version, supported messages, instrument identifiers and entry types with the counterparty. Treat snapshot and incremental handling as negotiated interface behavior; do not infer it from the word FIX alone.
Requirements to confirm
- Counterparty FIX dictionary
- CFD identifier catalogue
- Snapshot and incremental rules
- Session recovery procedure
Bring the proposed instrument list, source documentation and consumer workflow to a technical discussion. The agreed integration specification defines coverage, fields, usage permissions and acceptance tests.
Integration brief
CFD FIX Market Data: what to agree before connecting
| Session agreement | Confirm the FIX version, identifiers, heartbeat policy and recovery procedure with the counterparty. |
|---|---|
| Market-data scope | Agree requested instruments, entry types, depth if applicable and update behaviour. |
| Instrument model | Map source identifiers, price precision, timestamps and required metadata. |
| Operational recovery | Test session reconnects and the treatment of application state after recovery. |
Use the counterparty specification
A FIX delivery plan for your instrument universe must define the agreed version, session rules and market-data messages. Confirm snapshot and incremental semantics with the actual counterparty. Transport connectivity alone does not establish a complete, usable instrument state.
What to test
- Exercise logon, disconnect and recovery in a test environment.
- Compare the agreed snapshot with subsequent incremental updates.
- Record rejected symbols and the reason supplied by the counterparty.