I am trying to create a chart report that should show different chart data for individual groups defined in the report. I am selecting 3 columns in my query, 2 columns are used for chart data and 3rd column is used for defining group section of report. I placed grouping column value in group header section and it's showing value as per expectation i.e. distinct value for each group. Chart is placed in group footer but this is showing same data for each group. I have removed detailed section as I dont need to show anything there. For better clearity I am adding screen shots of report output as well as chart configuration.
Chart Data Configuration: