Max Quantity Per Order

This value is the max shares (Equities) or contracts (Options) per order and is implemented consistently across all of a customer’s current ports. When the specified limit is exceeded, the order is rejected. The value can be changed in real-time by entering the desired limit and saving the change. The default value for the Max Quantity Per Order is 25,000 for both Equities and Options.

Cboe Titanium U.S. Equities/Options Web Portal Port Controls Specification - Max Quantity Per Order | Cboe