Performance charts need to use additional Axis for different units of measurement (i.e. Storage amount vs Storage Percentage)
When looking at the performance charts from within the portal and adding other metrics they currently all share the one left axis. They need to use additional Axis, right and/or left, for different units of measurement i.e. Storage amount in GB on same chart as Storage Percentage with a max of 100% makes the percentage non-visible. on the chart.