# Parameter `MaxRateType` Default Value: `AbsoluteChange` Defines if the **Change Rate** is calculated as the difference between the last two readings (`AbsoluteChange` = difference) or as the difference normalized to the interval (`RateChange` = difference per minute). !!! Note This parameter must be prefixed with `` followed by a dot (eg. `main.MaxRateType`). `` is the name of the number sequence defined in the ROI's.