How to cycle between $ figures and units in bar chart?
I have a bar chart showing Sales Dollars and Purchases Dollars (expressions) by Month (Dimension). I would like to have a way for the user to choose to see Sales Units and Purchase Units instead of the dollar figures. How can I achieve that? I looked into grouping expressions but I would not like to have 2 cyclic buttons (one for sales and one for purchases). I would like to have one single button to change all expressions in the chart.