If the speedometer is placed on a view page in a data group, you can choose a Data field here that returns the data for display.
This is not possible on view paged on the first level of an application. A static text can be entered with the Static value option.
You can enter a formula to the Calculation field. System values (request or session value,
processing context) can also be used as data sources. The Value and Specification, which are used when no value can be returned
from the system value, can be entered to their corresponding fields underneath if the System value option is selected.