Create Charts using Average Value

Hi Guys,

We could do with having the ability to use the average value of a column when building charts.
Like you can already select ‘Count’ instead of having the sum of the values. We just need an ‘Average’ value here, like you do when you just add a number widget to the dashboard.

We are trying to create a chart showing our Average Install Time for each item on the board.

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Does anyone have a workaround for this?