@aam Did you ever get a response on this? The first example on the dashboards serial chart page suggests it's possible, but I can't seem to find any option/instructions to do create one.
I have the same issue. Even the button on Dashboards to create a chart suggests it's possible, but I can't figure out how. Did you get a solution?
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Been a while but if anyone is here, you just need to use the features on the serial chart and add multiple series.
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