An auction order is submitted at the Calculated Opening Price (COP). If the order doesn't execute, it is resubmitted as a limit order at the COP or best bid/ask.
To create an auction order
Click the Ask price to create a BUY order, or the Bid price to create a SELL order. This action will open the Order Ticket window.
Select an order type in the Type field.
In the Time in Force field, select AUC (auction).
Transmit the order by clicking "T" in the Status field.
Available for limited products and exchanges, including futures on HKFE and stock on LSE, IBIS, and VSE.
For a more detailed description of auction and other order types, visit theOrder Types information page.