Hi,I think that would be called profit on turnover.
efficiency tells you if your strategy is spending too much to win too little. The closer to +1.00 you are, the better your strategy is (its efficient). The further away from 0 towards -1 you go, the worse your strategy currently is ( its inefficient).
See attached, 15 wins, 8 losses, efficiency -0.00. So the loss on the day1 of -6.80. Not so good but the strategy efficiency rating tells me its worth pursuing. So on another day with a better run I get 17 wins, 6 losses, efficiency is now 0.14 with a profit of 21.68
Larp