Radar Chart Max Value Property / Second Series

Hello, i’m buiding an app to show people skills in a Radar Chart.

However, the chart doesn’t allow me to specify the max value of the chart. The range must be from 1 to 10 but the max value is set to the biggest value measured.

So, an user that has the max score of 8 may think he have maxed scores.

A second data series would be great.