When calculating the market value and P&L of US stocks, you can select the time period to be covered in the calculation. Please be aware that:
If you select whole day (including overnight), the total amount of assets and positions may be varied within the overnight session; Daily P&L will be reset at 20:00 ET, and T-1 Daily P&L values will be displayed between 20:00 and 24:00 ET.
If you select MKT+Pre/Post-MKT, during the overnight session, the total amount of assets and positions will be counted at the closing price of extended hours (20:00 ET) and fixed during the period of overnight session; Daily P&L will be reset at 24:00 ET.