Usage sumarization

[Marcin]

Hello
I wonder is it possible to create a graph like below? I made it in gimp to show what I need. I need, to draw hrule on some level (that is simple), but more advanced thing is to highlight that area and calculate overall time when ex. "cpu usage" was exceeded.

Thanks for help

Marcin

[gandalf]

Do you only want to colorize or do you want to sum up what was highlighted? Is the 80% percentage line a constant line or is it computed from the currently displayed data?
Reinhard

[Marcin]

Do you only want to colorize or do you want to sum up what was highlighted? Is the 80% percentage line a constant line or is it computed from the currently displayed data?
Reinhard

I want to colorize like on attached image and sum up too. Line on 80% is constant, but more importatant to me is to highlight area witch exceeded constant level.