I used an Area chart to compute view of some kind of usage.
I have 26 lines, each one with a random max nb of tokens. I want to graph the overall nb of tokens at any one time.
I use an area chart, graph the min of the token amount per line. On the Y axis, I have the min of tokens, and have a X-axis Date Histogram, with an aggregation Split Area per line id.
As you can see on the attached graph, the Area Chart doesnt display what plotting individual lines shows.
Basically if there arent any log line in an intermediate bucket, the Area Chart sees them as Zeros, where the line chart carries over the last known value.