# Profit Loss Math

All open positions on Delta are marked at the [fair price](https://guides.delta.exchange/delta-exchange-user-guide/trading-guide/fair-price-marking) of the Futures contract. Thus, Unrealized PnL and Liquidation Prices are computed using Fair Prices, while Realized PnL is based on actual entry and exit prices.

PnL for a long/ short position in a Vanilla Futures

$$PnL = ± n*m*(Fut\_CurrentPrice - Fut\_EntryPrice)$$ 

PnL for a long/ short position in an Inverse Futures

$$PnL = ± n*m*(1/ Fut\_EntryPrice - 1/ Fut\_CurrentPrice)$$ 

where $$m$$ is the multiplier and $$n$$ is the position size (i.e. number of contracts).

If a position is acquired at multiple entry prices, an average entry price is computed and used for PnL computation.