CTP Futures and Crypto Exchange APIs: Data, Limits, and Event Handling
Summary
The document compares commodity futures CTP connectivity with cryptocurrency exchange APIs across historical data, protocols, market depth, update frequency, request limits, and stability. It explains that CTP generally relies on externally sourced historical quotes, pushes quote and order changes, and requires active queries for account, position, and order information. Crypto APIs more commonly expose historical candles and trades through REST or WebSocket interfaces, with deeper order books and more frequent updates described in the article.
The practical section focuses on FMZ’s CTP market-data modes. Cached calls wait for updates and can block when a contract is inactive; immediate-update mode returns existing data and needs a sleep to avoid a tight loop. For multiple contracts, event-push handling can dispatch tick and order events, with a wait-any option for multiple exchange objects. The figures and code are implementation guidance rather than a measured comparison, and the stated limits and behaviors may vary by broker, exchange, or platform configuration.
Key ideas
- CTP and crypto APIs differ in historical data availability, protocols, depth, and update behavior.
- CTP quote and order changes are pushed, while account, position, and order inquiries are actively requested.
- Cached CTP market calls may wait indefinitely when a contract has no new activity.
- Immediate-update mode avoids waiting for fresh quotes but requires pacing to prevent a fast loop.
- Event-driven handling can coordinate tick and order updates across subscribed contracts.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.