Is there a way to remove outliers from the data?
If you want to exclude individual tasks from the metrics, you can do it by following the steps below
Set a specific label or tag (e.g. "excluded") to the tasks you want to exclude
Go to Screenful and reset the data source in the Data sync options
Go to the chart in question and set a filter (e.g. label is none of 'excluded')
If the task is already archived, you have to unarchive it first. Then apply the steps 1-2. After that, you can archive it again.