This indicator plots horizontal lines for the high and low of each of the last x (configurable from 1 to 20) bars, each of which may be anywhere from 1 minute to thousands of minutes--preview image is for 90-minute bars. I have found that it goes nicely alongside the daily version of this indicator.
120 minute levels x10 with 1-day levels x10:
240 minute levels x20 with 1-day levels x20:
300 minute levels x8 with 1-day levels x10:
618 minute levels x3 with 1-day levels x1:
Release Notes
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Updated to select color as an input (otherwise you'd have to manually change it 20 times in the style tab). Changed default bar length from 120 to 108000 minutes (75-day-long bars, so you would have 20 75-day minimums and 20 75-day maximums plotted). Take a look at three versions of these added to the same chart at different, very long-term bar lengths!