Definition

Yvan Fornes says:

This approach can be useful when you need to visualise marks that are on top of each other.

It is a style similar to an area chart, but the data is divided up by calculated ranges within the data, rather than dimension members themselves.

Videos

A comprehensive tutorial is available on Tableau.com. I think you need an account there to view it:

http://www.tableau.com/learn/tutorials/on-demand/horizon-charts

Blog posts

Nathan Yau explains the use case for this chart type:

http://flowingdata.com/2015/07/02/changing-price-of-food-items-and-horizon-graphs/

Yvan Fornes wrote this detailed article, after being inspired by a viz from Joe Mako.

https://www.tableau.com/about/blog/2016/4/visualizing-dense-data-how-cut-and-superpose-areas-52839

Example workbooks

Joe’s inspirational viz is available here:

https://public.tableau.com/profile/joe.mako#!/vizhome/UnemploymentHorizionChart-Gallery_4/HorizonChart

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