Insight graphs on peak in stead of average?

[cybermaus]

Is it possible to collect the insight graphs on peak values rather then average?

For example, to judge whether I need to upgrade my campground fiber from 100Mb to 250Mb (probably not, but lets not get ahead of ourselves) I would like to see the 2-second average. Or if that is too much data, aggregate into 5 minute blocks on peak (2 second) bandwidth instead of average bandwidth.

(PS : I suggest 2-second, because that is what the "Traffic Graph" seems to be using, so likely that value is already processed somewhere.)

Or is there some other way I can detect if web browsing is sometimes slow due to congestion?