On the Coinmetro Margin Trading Platform, you will see a metric that says Open P/L (Profit/Loss) with green or red numbers beside it. On other exchange platforms, this may be known as 'Unrealised' or 'Floating' P/L.
Open, or Unrealised/Floating P/L, refers to the profit or loss held in your currently active trades. This is equal to the profit or loss that would be “realised” if your open positions were closed. This is also known as “Floating P/L” because the value is constantly changing as your positions are still open.
Your Open P/L continuously fluctuates with the current market prices if you have open positions. For example, if you currently have an open profit, and the price of the assets you are trading for then moves against you, the open profit will then become an open loss.