(Haven't read the last 6 pages or so, and have no interest in any fight going on).
To OP. We don't really think of trading profits as "ROI." Or even in terms of return at all.
For example, our people might put up $20K, and make $5k per week...but they are using our capital to trade with. We consider the money that is being used as simply another tool, just like a computer or trading method. An investor looks for ROI.
FWIW,
Don