I make stock analyses before the opening, these levels i draw are strong support/resistance and are the most powerfull on the same day. So i use them the moment when the market opens.
You can see somethimes i use 2 - 3 levels because i dont know where the market will open.
when the market open i see witch levels are still valid if it gaps above or under my level this one cannot used anymore. If price come close to my level i place a limit order. time frame i use are 5-10 min candles if price close right under or below the level with few penny's its of the table ! my risk reward ratio is 2:1 would be good to use trial these are scalp trades in high illiquidity market conditions !