About pre-opening - Hong Kong Market

In the pre-opening period, when the buy and sell orders have accumulated for a period of time, they will be matched in the preset matching period. Orders will be matched according to the order of priority of order type, price and time (at-auction order enjoys the priority of matching order), according to the final reference equilibrium price order. In the pre-market period, the trading system only accepts [Auction Market Order] and [Auction Limit Order]. After the end of the pre-opening period, any uncompleted auction market orders will be automatically cancelled before the continuous trading period begins.