Calculated values are values derived from some kind of aggregated expression, similar to the data shown in cross tables.

The general idea of calculated values is that they can be included directly where they are needed, in the context of a graphical table or a text area, to provide information at a glance.

By adding rules that control the color and font style you can make sure that a value stands out, when it falls outside of the specified limits:

Calculated values can be set up to change with filtering like any traditional visualization, or they can be locked to show fixed values using the settings in the Data properties for the Calculated value.