Are limit orders placed during after-hours trading still valid after the market opens?
A 24-hour day is defined as starting at 10:00 AM Japan time (9:00 AM during daylight saving time) (US market time). Orders are valid only for the day they are placed, so please note that any unexecuted orders placed the previous day will expire at 10:00 AM Japan time (9:00 AM during daylight saving time).