When placing an order, you must choose an 'expiry type'. This will affect how long an unfilled order stays in the market before being cancelled.
There are two expiry types available:
Using the 'day only' expiry type means the order will remain open (in market) for the duration of the trading day. If the order does not fully fill by the end of the trading day, it will be cancelled after the market has closed.
Good Till Date
Using the 'good till date' expiry type allows the order to remain open (in market) until a specified date, which provides more opportunities for the order to be filled. If the order is not filled before the specified date, the order will be cancelled.
You can choose an expiry date for a period of up to 6 months from the date of the order placement. Once you have placed the order, you can continue to push the expiry date forward by editing the order.
Please note: When trading US securities the order will only be active on the market for 1 month, after which the order will be cancelled. For Hong Kong securities, you will only be able to place day-only orders.