Good idea, an alternative solution would be to track your trades with excel. Anyone with basic excel experience would be able to design a suitable spreadsheet for trading activity. If people are interested I'll see what I can do.
However, I do realise you'd run into some problems if you're trading 20+ individual powers at one given time, it would be tedious to input all that data yourself.
This kind of data tracking would probably be more efficient if we had the power you suggested!
Statistics can be added too to see which days are most profitable, total profit, av