Personally I’d mark up obvious levels on a TF either side of my Entry TF. I place a lot of trades EOD via orders off the Daily chart - I will also mark up levels on the 240 and the Weekly, in case I miss a major level and trade into it. If I’m placing trades on the Hourly or even the 5 minute (not often for me!) then I will always want to see any key levels on other TFs around there. What can look like a trend on the Hourly can be a 240 Range, for instance. So I keep my levels on a number of other charts, too, although one chart will always be my principal for any given trade.