Good mornig folks!

I would like to change not only the value of the dial-needle but also of the min/max limits and color boundaries. At the moment I'm able to do that using an xml file, passed with resource tag, in the .xaction file.

I was hoping to do 2 things:

1) pass a parameter dynamically by clicking on a previous report and to change the dial chart values and title/subtitle change according to that

2) do the exact same thing but for more than one dial chart at the time(they are called dial grid chart, I think). I suppose I should use the <loop> tag, but I don't understand exactly how to apply it.

Any ideas?