- PnL: how much money you have made or lost on this product since you were last flat.
- Average Open Price: Average price at which you opened (bought if you are long, sold if you are short) since you were last flat.
PnL = Sum(current mark price - fill price) * fill size * (-1 if sell, 1 if buy) for all the fills since you were last flat.
Your percentage PnL for futures is PnL / position size.
You can find a summary of your historical PnL here.
Average Open Price
This is the weighted average of the price of your opening fills since you were last flat.
Opening Fills = all fills that were opening (buying if you are currently long, selling if you are currently short) since you were last flat.
Opening Size = Sum(fill size) for all Recent Opening Fills.
Average Open Price = Sum(fill price * fill size) for all Recent Opening Fills / Opening Size