Yes it is possible. There are a number of ways of accomplishing that. For the Easy Chart, check out the following under “Dynamic Pens” in the Advanced configuration settings of the link below. “Chart WHERE clause” and “dynamic groups”. For the classic chart it is a matter of binding your query that populates the chart data to an expression that contains the state of your radio button. That way, a change in the selected radio button changes the database query and causes it to run again and update. This is simpler than it may sound.