iSTOX's exchange trading hours are:
Monday to Friday (GMT +8):
Pre-opening: 9.30am to 9.58am
Non-cancel: 9.58am to 10.00am (*)
Trading: 10.00am to 5:00pm
Pre-closing: 5.00pm to 5.04pm
Non-cancel: 5.04pm to 5.06pm (*)
Close: From 5.06pm onwards
(*) The exact start of the non-cancel phase will be random