Taken me years to get it where I have positive expantentcy, in theory when I open any trade 30 minutes or longer timeframe using variation of ways to hedge. I do have loses when stock gets stopped out and instead of stock continuing in wrong direction so the hedge gains money to cover lose on the underlying, it stagnant or reverses but this happens seldom. So my drawdowns now are much less than when I first started 41 years ago, rather have much smaller drawdown then concern myself with upside that I have limited control. I consider this to be my "edge".
Scalping/day trading I consider to be the worst as far as risk, most signals have inverse risk to reward, changes I have made in last year regarding my averaging down on any position including longer term have reduced threats to my accounts by reducing the amount of levels I use to average down, so I stay away from huge daily loses. Indexes due to HFT has changed the game a bit as well, retracements regarding my signals don't retrace as far now was another reason. My risk is not a percentage of account, but based off on using my own margin of $7,000 to trade one lot of Indexes at CME, if I was to have wrong direction in trade and exchanges closed and not reopen for a week, would want to be able to have something left. My risk in signals not changed in 10 years, equity curves goes up, add more size.