Horizon Chart - Custom Visualization: How is the baseline determined?

[g2ugzm]

I apologize in advance if this question is too remedial but.....

I have a timechart serving as an input to a Horizon graph, for source traffic into some IIS servers.

sourcetype=iis  | timechart span=15m sum(sc_bytes) by host

The graph looks fine, makes perfect sense, but I don't know how the baseline is determined? What calculation is performed?

[niketn]

When you pick Calculate relative changes option in Horizon Chart (default behavior), then relative data points are displayed based on the first value in the series considered as baseline. If you un-check this option you will see actual value for each data point.
,When you choose Calculate relative changes, baseline is the first data point of the series. This option is enabled by default.

[sudoritz]

is there a way i could have a Min - max I can see this really powerful with monitoring 100+ servers by grouping /cluster that is But even if the avg CPU + 20% at all during time range show only the high ones.

so if i have low 0 - 100 (CPU percentage)

Kind of like this
https://docs.splunk.com/File:Scenarios_format_edit_single_val_ranges.png