Multi-layer Heatmap

We really need the ability to have multiple map layers on a heatmap. Example, population/population density and quantity of something you are measuring (sales, etc.). It will greatly help to see if what ever you are measuring is doing what is expected vs. population and help you focus on areas where you should be sending more resources. Maybe an ability to toggle between the layers or show both. It would be a game changer for me and my job.