How to place an Extended Trading Hours order for US market?

If an US stock is eligible for trading during Extended Trading Hours, the order input page will display the option to allow you to place such orders.

Select "Allow" and accept the relevant risk disclosures, and then the order will be traded through pre-market, regular market and after-market sessions of that trade day.

What hours are pre-market and after-market session of U.S. market in BOOM?

For pre-market session, it is 1.5 hours prior to the opening of regular trading hours; for after-market session, it is the 2 hours after the closing of regular trading hours.

You can place orders for pre-market and after-market anytime, however, such orders will only good for the trade day submitting the orders. The orders with no execution or partial execution will be cancelled and expired at the end of after-market session (i.e. 2 hours after the closing of regular trading hours).

Is “Good-Till-Date” order available for Extended Trading Hours order?

No. Only “Day” orders are allowed. The orders with no execution or partial execution will be cancelled and expired at the end of after-market session (i.e. 2 hours after the closing of regular trading hours).

What order types we can submit for Extended Trading Hours orders?

"Limit" orders only.

Can I trade OTC Bulletin Board (OTCBB) securities in extended trading hours?

No. OTCBB securities are not allowed for trading in extended hours. Only securities trade under National Market System (NMS) (e.g. NYSE- or NASDAQ-listed stocks) are allowed.