Yes, you can place orders outside market hours in our trading platforms. Orders entered outside market hours will sit in a queue until such time as the market opens.
Important: When placing orders before or after market hours, you must remember to enter a Limit price. Market-to-Limit order types are not an available price instruction for outside market hours. This includes the pre-open and auction phases of the market.
All Market integrity rules still apply on order placed outside market hours.
See Market Hours here.