Execution Priority

  1. Regular market and MOO orders received prior to the auction will be executed in time priority.
  2. Limit, LOO and LLOO orders priced at or more aggressively than the auction price received prior to the auction match. Regular limit orders may include display, hidden and reserve orders. Price/time priority of the specified limit will be considered and hidden followed by reserve size for each price level will be executed after displayed liquidity prior to moving to the next price level.
Cboe Titanium U.S. Equities Auction Process - Execution Priority | Cboe