Help with percentage history

[HugosDad (Nick)]

Hi,

I have a gauge set up to show me the % of my electricity that occured during off-peak times:

    - name: "Imports Octopus Off Peak Percentage"
      unit_of_measurement: '%'
      state: >
        {{ (states('sensor.octo_go_import_offpeak')|float 
         / 
         (states('sensor.octo_go_import_peak')|float + states('sensor.octo_go_import_offpeak')|float)
          * 100) | round(2) | float
        }}

The gauge populates just fine, but the history view is not a line graph like other gauges:

What am I missing please?

Thanks

[Troon]

If you have only just added the unit_of_measurement, the graph will not update until the window of history gets rid of the old non-unit-ed records.

Almost certainly unrelated, but your float filters should have default values: states(...)|float(0) for example, but be careful with using 0 on denominator values.

[HugosDad (Nick)]

Ah, didn’t know about the window of history. Will check back tomorrow!
Thanks

[Troon]

If you click “show more” from where you took your screenshot, you can constrain the graph to a shorter window, which should confirm that it will display as a line once the old values are shunted left.

[HugosDad (Nick)]

Yep, got it! Thanks