This menu option will recalcuate statistical data for the selected watch item(s).
For performance reasons, statistical data is not calculated on the fly. If historical data is changed or out of sync (due to system failure or crash), this option will update statistical data by enumerating all historical data. It is not normally necessary to use this option as statistical data will be correct 99.9% of the time.
Warning if a large amount of historical data exists, more than 100,000 data points, this option will take a long time to process.
The watch item is temporarily suspended while this action is performed.