The Historical Index Chart displays the monthly (or annual) rate of return of the defined index.

To the left of the Historical Index Chart is the Distribution of Interest Rates. This chart is a histogram, showing the count of how many times an interest rate falls within a specific range. Below the chart is the Overview of Index panel, providing summary information about the index (or blend of indexes). They are both optional and may be hidden  from the Config panel (located to the top-right of the chart).