I would not call it a strategy, is more a show off.
with 90% win rate it means there are 10% of loses and this guys is risking what 5%? For 100 trades he has 10 loses but he claims never had more than three consecutive loses and what if he has 10 in a row? Bye Bye account and with a 1:1 risk reward ratio in average it means there are trades that reward is less than 1, if he has ten loses in a row it will take more than 100 average winning trades go go back to break even.
I was having something like 70% win rate and obviously very little risk reward ratio but i had $$ on my eyes and so I increased my risk upto 2% per trade and I had thre loses in a row that wiped out all I’ve made during the year. So I am very exceptical abut people claiming to have more than 40% of winning trades. It’s in BB forum rules, “No Perfect Traders allowed”