Good news for your dashboards: the Radar and Histogram widgets are evolving!
Until now, these two widgets were designed to be powered by external data sources: API, web service, business tool, IS, etc.
They can now be used directly from your Suivi board data. 
Specifically, this makes it simpler to create visualizations such as:
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a maturity, score, skill, or evaluation radar;
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a distribution histogram by status, priority, category, phase, domain, etc.;
Connections to external sources remain available for more advanced cases, of course, but you can now start much more simply, directly from your Suivi data.
Try it out in your Dashboard views 
And as always, feel free to share your use cases or dashboard examples in the comments: it helps us enrich future uses and documentation.