The Oracle Analytics Library: https://www.oracle.com/solutions/business-analytics/data-visualization/extensions.html
Within the Extensions tab
or download here
Name of Viz: Butterfly Chart
Authors: G.Adashek & D.Flores
The Butterfly chart, also sometimes known as a tornado bar chart allows to compare 2 data sets side-by-side.
This provides a quick analysis of variances and is a simple comparison chart.
Use the tooltip in this custom viz to easily show the variances.