The Stat Card displays one data point and optionally a value for comparison and the percentage difference of it to the main value:

Stat Card

Expected Data and Graph Designer

The Stat chart expects data in a two column format with the title (e.g. "Revenue") in the first column and the value in the second column. If you want to use a comparison value, it should be written into the second row. The percentage difference will be calculated automatically:


The selection of the x-axis in the Graph Designer does not have an effect. 

You can enable the comparison value by turning on Show Trend in the Graph Designer:

Stat Card - Trend