I know a lot of you use larger time frame charts to spot potential S/R for intraday trading, which larger time frames do you use?
larger time scopes fit more price action from farther back in time into the same size chart, thats the reason you can spot s/r with them, there isnt anything special about any particular one of them. chose anyone you want... the only things you really need to consider are screen space, and how well the chosen interval divides into market hours, et cetera.