How to Add a Vertical Line to a Horizontal Bar Chart

Calculating the Average Value

We want to add an average value line to the chart, so we need to build a new series. In an empty space on the spreadsheet, add values for 0 (zero) and 1. To the right, calculate the average of all the sales figures. In the example, the calculation will be as follows:


See the image below for reference:

Average Value Calculation