Hi Max,

You might want to consider using POT (Profit On Turnover) instead of ROI (Return On Investment) to describe your results as it is more commonly used in horse racing. I say this as in your above examples you refer to getting back 3 units on an 11 unit outlay and calling it a 27% ROI which would indicate a profit when it is actually a loss (-8 units).

It is much the same calculation but you divide the actual profit (or loss) by the outlay and not the total return.

Keep up the good work.

Cheers,

Matt.