Plot multiples metrics in a single graph

Hello everyone,

Anyone know how to plot multiples metrics in a single graph using JON? Is this possible or do I need to build a plugin just to consolidate the data and plot the graph?

I just want to see in a single graph the JVM Free Memory for all the JBoss instances in a compatible group. When you try to put a graph in a dashboard, you see the metric for just a single instance, not for all of them.

Thanks for any help.
Ricardo Alonso