I have a feature service in AGO published from ArcGIS Server 10.6. In my web map, in Configure Pop-up, I have create a computed field for the length of the feature using Length($feature, 'metres') and called this field "Length".
In my operations dashboard I added an indicator based on this feature service, but when I change the Value Type for the indicator to Feature, the computed Length column is not an available choice.
How can I make this computed field available to the indicator in OD?
Or, how can I make the STLength column visible in the feature service?