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Exchange FIX Rate Limits

Order Entry Limits

The FIX Order Entry API rate limits are:

  • 50 requests per rolling second1 per session
  • 100 messages per second in bursts
Rolling second
1The clock starts when the first command is sent. We use a lazy-fill token bucket implementation.


  • Maximum connections per profile: 75. See FIX Best Practices.
  • Maximum connections per user across all profiles: 175
  • Maximum API keys per session/connection: 1
  • Maximum profiles per user: 100
  • Maximum orders per batch message message (new and cancelled): 15

Market Data Limits

The FIX Market Data API is limited to 1 connection per API key. It does not use FIX order entry rate limits (connections, rps, burst rps).

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