Thank you for giving your advice.i was thinking nobody would ever answer. ROA is the net profit/ Max Intraday DrawDown. It's more of an index of regularity of the returns. It's like a return /risk ratio. I also like to use profit factor in conjunction with the number of trades. I think ROA in backtest / ROA in out of sample is a good measure for an edge if it s possible to quantify it through backtest results.