UPL calculations using Mark price
Open long
Inverse:
Unrealized PnL = Position * ( 1 / Average Execution Price - 1 / Mark Price )
Vanila / Quanto:
Unrealized PnL = Position * Multiplier * ( Mark Price - Average Execution Price )
Open Short
Inverse:
Unrealized PnL = Position * (1 / Mark Price - 1 / Average Execution Price )
Vanila / Quanto:
Unrealized PnL = Position * Multiplier * ( Average Execution Price -Mark Price)
*See the Multiplier Details