If you hover over the data it will show you the data points for each line. The minimum refresh period is 50 seconds, so as you slide down, the data points box will show the data for each capture. You can modify the refresh time settings in the advanced settings module.
If there isn’t one already you could look into opening a feature request to enable options to select which data points you want to view in this widget, but there are probably better alternatives, such as using Grafana. Or InfluxDB/ Grafana, you just want to be careful how much of a load you add to a system with additional logging/reporting and communications with other systems, it can potentially have impacts on voice quality if you go too far.
@lgaetz has a related post here Monitoring FreePBX system with Grafana Cloud