What's the difference between Mark Price and Last Price?

We provide several different profit and loss (P&L) and price calculations shown below. 

Daily P&L (shown in base currency):  ((Position Now * Current Market Price) - (Position * Price at Reset Time) + (Net Traded Amount) ) * Daily exchange rate to the base currency. This value shows the change in the market value of your open position relative to a reset time (details below). Please note that Daily P&L uses the time zone of the specific instrument, and…

To access your portfolio in Client Portal:

• Click on Portfolio in the top menu and select Positions.
  • The dashboard in the upper part of the page shows key account metrics like Net Liquidation Value, Daily P&L, Unrealized P&L…

If you open Client Portal on your mobile device, you can see your Account Window by selecting "Home" followed by “Top Portfolio Positions”. Tap on the ‘arrow’ icon in the upper right corner to display additional information related to the section. On the top of that screen you will see a row with your account’s Net Liquidation Value, Daily P&L, Unrealized P&L, etc. Scroll to the right and the tap on the plus (“+“) sign. The screen with your account balances will open and will display your Available Funds, Current Excess Liquidity, SMA, Overnight Available Funds, Day Trades Left, etc…

When the "Order Preview" for a futures order uses a “Net Liquidation Value” for the order’s credit check that refers to the Net Liquidation Value currently residing in the Commodities segment and any available unpledged equity in the Securities segment that can be swept into the Commodities segment. So the account’s Total Net Liquidation Value number can be different than the Net Liquidation Value number displayed in a future order’s Order Confirmation preview window.  The credit check at the time an order is entered looks at the amount of Available Funds in the account. If the account has enough Available Funds for all current open orders and the new order being credit checked then the order can be accepted…