Flipping between two charts with unique expressions

[#1]

Long time reader, first time poster.

I have two charts that have the same dimension but different expressions. I really want to create a button that when clicked will flip between the two different charts.

This would be similar to a fast change chart except I am under the impression that is for changing chart types, and is limited to using the same expression in each chart.  I want to change the expression being graphed, not necessarily the chart type.

Thanks, any help is appreciated.

[dgreenberg]

Another alternative is to have multiple expressions but have them conditionally shown via a variable.

So if you press a button or do something else it can change the value of the variable.  Or you could have a data island with an expression picker.  Pick an expression from that listbox and it will hide all the other expressions except the one with that ID.

I use that more often as a Dimension Picker but I don't see why it wouldn't work.