Limit Order: Limit order needs to specify the transaction price, and will only be executed when the specified price is reached or there is a better price.
Market order: A market order does not need to specify a price, and it is bought or sold at the current market price.
You can place pre-set orders during non-trading hours. These orders will be queued for execution until the market opens.
To place pre-set orders for the afternoon session:
Submit pre-set orders after the morning session closes at 10:30 Hong Kong Time.
To place pre-set orders for the next trading day:
Submit pre-set orders after the current day's market closes at 14:00 Hong Kong Time.