I automated a strategy to trade only the NQ . I backtested a few variations of this strategy and some work better than others . Would it be safe to say the strategy with the highest sharpe ratio has the best edge ?

I've always preferred the Sortino ratio to Sharpe as the Sharpe Ratio unfairly (IMHO) penalizes upside (positive) volatility. That said, I assess my systems from the equity curve they produce, by running a K Ratio through them. K Ratio gives you an objective measure of how smooth and positive an equity curve is. ~chaffcombe

The K-Ratio is an excellent tool. I use it for all of my daily and weekly automated trading. However, it is not available for use intraday. That is its only drawback. I also like RINA index in dailly trading. But, I have never found the sharpe ratio or Return Retracement Ratio to be of any use in my trading

OK I'll assess its viability with K ratio then . I'm not concerned with intraday , my strategy is for swing trading on longer timeframes . Thanks for the advice .

Obviously it depends how you are doing your backtesting or analysis, but K Ratio is nothing more than a mathematical calculation, and therefore can be calculated and applied across any time-frame. I do the vast majority of my analysis on 5 minute bars, but it works equally as well on daily intervals

You are correct K ratio can be calculated for any time frame. I was referring to TradeStation who does not show K-ratio or Sharpe Ratio from intaday optimizations.