How to Reference a Visualization in an Expression

I have a cumulative distribution visualization set up that allows me to select whatever data set I want and plot multiple distributions by the color category. I want to put a summary box with statistics of each color on the visualization as well, so I inserted another table on the page, but I can't figure out a way to reference the CDF axes. Do you know if there is a way to do that?

rank(${Axis.X.Expression},"asc",[${Axis.Color.ShortDisplayName}]) / max(rank(${Axis.X.Expression},"asc",[${Axis.Color.ShortDisplayName}])) OVER([Axis.Color])


Image icon 8-14-2017_7-07-57_am.png226.56 KB