Every trade is a WIN.

If your strategy should yield you on average +1.5R per trade(including losses)

Then every single time you mimick the strategy, you won +1.5R

And every time you didn_t mimick your strategy.. Long-term you_d be unprofitable, therefore that_s a LOSS.

Even if it turned out to be positive P&L that time(key words "that time")

It_s actually not, because in the long-run, it would do you more harm than good.