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.

Maximums

• 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).