Excel inserts a chart that does not yet track your data correctly. Right-click on the chart. Click "Select Data" to open the Select Data Source dialog box.

Learn how to show charts with hidden data cells in Excel. When there is data that is hidden in your table, Excel will not show that information in the chart.

Once you've mastered some of the more straightforward Excel charts, try using some that offer more specific functions and data visualization.

It's time to dump the pie charts and move to donuts or even waterfalls to show off your data in ways people can better grasp.