The Show in Chart selection criteria for this chart allows you to specify that the chart output will include Time Elapsed / Project Date Range ratio, or Actuals / Project budget ratio or Actuals / Project Est. Total ratio. When choosing either of the latter options, you can further decide whether the statistic reported on will be one of the following:
Expense Costs, Hours, Labor Costs, Total Billable Charges or Total Costs (note that you must have the Cost Rate Manager role in order to see the Cost related options).