OMG
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OMG
Whether an Edge or not is in the eyes of the beholder!
imo, there are directional edge (for viability), money management edge (for profit) and risk management edge (for tail risk)!
Just 2 cents!
System Shmystem, overall uptrend buy dips, overall downtrend sell retracements, that's it in a nutshell, the rest is taken care of by what OddTrader has said above and Izzy on numerous occasions.
Look at USDJPY, weekly trend is undoubtedly up, currently there is an oversold dip, oversold was registered on 240m RSI (any lower time frame below weekly would do), take low of current double bottom and place stop somewhere below it and buy wherever (either pick up lows on small time frames or buy breakout). Your target ought to be x3 the size of your average stop loss (average stop loss is $100, then target is at least $300), anything above x3 has to be trailed, as much higher rewards can sometimes be attained. And that is it, the rest will be taken care of by odds that are now stacked in your favour.
There aren't any active traders left here who can do that. Hasn't been for quite a long time.I will only believe in existence of consistent high win rate systems when I see them in a way of real time calls posted. I don't need to discuss all other aspects that you mentioned above, I am not new to this. I challenge folks that state high win rate is a necessity, yet fail to prove their own ability to achieve it.