JohnG
Yes, of course we know that. But the main reason we haven't added chart widgets yet is because the data for historical charts must be prepared, collected and stored in a specific format. Drawing is not a problem when the data is prepared, but now the question is precisely in preparing the data.
In the near future, I think we will add charts in a fairly simple implementation, without storing historical data on the server side, just plotting in real time. But our goal is real historical charts with server side storing.