Velocity Logic is an exchange-level safeguard that temporarily pauses trading when prices move too quickly, and it can cause your orders to be held or rejected during the pause.
Overview
Velocity Logic is a pre-trade risk mechanism used by CME Group across all its futures markets. It monitors how fast prices are changing and triggers a brief pause if movement exceeds a set threshold within a short time window. This is separate from daily price limits and circuit breakers, and it applies to all traders on the exchange, not just Tradesea users.
How It Works
The CME tracks the speed of price changes on each contract. If price moves beyond a predefined threshold within seconds, the exchange triggers a momentary pause. The order book enters a reserved state where no new trades are matched. The pause typically lasts only a few seconds before the market reopens.
What You May See in Station
Your order stays in a "working" state longer than expected
A market order are rejected during this period.
The price ladder or DOM freezes briefly and then resumes
These are exchange-level events. Tradesea reflects what the CME is doing in real time.
Key Points
All CME Group futures contracts are subject to Velocity Logic, including NQ, MNQ, ES, GC, MGC, CL, and others.
Velocity Logic is not the same as a circuit breaker. Circuit breakers halt trading at a fixed price boundary. Velocity Logic is about the speed of price change and results in much shorter pauses.
Slippage may occur when the market reopens, as the first available price may differ from where it was before the pause.
Tradesea and Station do not cause these pauses. Velocity Logic is enforced entirely by the CME at the exchange level.
Tips
Use limit orders in fast markets. They give you price control if the market reopens at a different level.
Watch for scheduled events. Economic releases (NFP, CPI, FOMC) frequently cause rapid price moves where Velocity Logic is more likely to trigger.
Reference
For the official CME documentation on Velocity Logic, visit: https://www.cmegroup.com/education/demos-and-tutorials/understanding-velocity-logic