[Sparrow]

If it's not possible with their platform you can only go looking for a third party tool or put something yourself together with excel or have someone write a piece of software for you.

I tried to spin my own tool for my old broker, got pretty far but ran into some problems.
I suppose the data you get is opening of a position, price entered, instrument, number of lots and close of position, price exited, instrument, number of lots.

What you'd need to add manually is the $point value per instrument and comes the difficult part. If you always have only one trade on and your money management strategy doesn't include partial profit taking all is fine and dandy. If not, it's hard to tell which lot belongs to which trade especially if you have more than one trade per instrument on at a time.

Gross profit/loss should be easy to calculate with an excel though.
Hope you can find some tool or at least make infinity aware of what is lacking in their software.
Another a bit drastic measure would be to switch to NT, guess it's free for trading Infinity anyway.

Good luck