For this strategy I like to use my 38 and 61% as a range given the is a visible Fair Value Gap from the previous day close and that FVG will only , for me , be valid if the was an attempt to it on the current day.
A 30 minute bullish engulfing stick is always a first confirmation for me , a second one , well buy the second one I looking to scale in .With good risk ,my stop loss below the previous low, I will sit back and enjoy a good book.