How to show a post aggregator field in a chart (in Insight)

[SwiftedMind]

Hey,
I have built a custom TQL query that shows me the "average used tokens per unique user". A used token is a float value from a signal:

{
  "aggregations": [
    {
      "fieldName": "clientUser",
      "name": "count",
      "type": "thetaSketch"
    },
    {
      "fieldName": "floatValue",
      "name": "totalTokens",
      "type": "doubleSum"
    }
  ],
  "appID": "my_app_id",
  "baseFilters": "thisApp",
  "granularity": "day",
  "postAggregations": [
    {
      "fields": [
        {
          "fieldName": "totalTokens",
          "type": "fieldAccess"
        },
        {
          "fieldName": "count",
          "type": "hyperUniqueCardinality"
        }
      ],
      "fn": "/",
      "name": "averageTokensPerUser",
      "type": "arithmetic"
    }
  ],
  "queryType": "timeseries"
}

This does seem to work. When I set the diagram to "Table", I get a "averageTokensPerUser" column.

But for any kind of chart, this value is not shown

How can I enable that for the charts?

Thanks! 🙂