Account value of the qualifying account must remain equal to, or greater than, the value after the net deposit was made (minus any losses due to trading or market volatility or margin debit balances) for 12 months, or TD Ameritrade may charge the account for the cost of the offer at its sole discretion. Session hours – TD Ameritrade offers pre-market (A.M.), after-market (P.M.), and Overnight extended-hours trading sessions on official market days (excluding market holidays). In the event that the exchanges close early, a P.M. session may be offered. A GTC order lasts until it is completed TD Ameritrade Extended-Hours Trading Time and Fees If you have a TD Ameritrade brokerage account, you have the ability to trade outside of normal session hours. These are from 9:30 am to 4:00 pm, EST. TD Ameritrade provides access to the pre-market session, which is from 7 am until 9:28 am, and the after-hours period, which lasts from 4:02 until 8 o’clock.