What might be the issue if only one KPI is showing when intending to display two in a chart?

When dealing with the visualization of multiple Key Performance Indicators (KPIs) in charts, the scenario where only one KPI is displayed, despite the intention to show two, can often arise due to the need for different axes. If one KPI should be displayed on the second axis, this indicates that the two KPIs being analyzed have significantly different scales or units of measurement.

For instance, if one KPI is measuring quantities in thousands while the other is tracking something in units, plotting them against a single axis could obscure the data representation and make the chart misleading. By assigning one KPI to the second axis, it allows each KPI to be properly scaled and visualized alongside one another, thereby making the chart more informative and accurate for analysis.

This suggests that the chart is designed to handle dual-axis functionality, which provides a clearer comparison without compromising the integrity of either KPI's representation. This is a common approach in data visualization tools where multiple KPIs need to be compared effectively.