In the restults page. Provide a way to lock the starting date, if different from the default start date.
Example of use, if during the run of an experiment something was added/changed and you wanted to view from that date forward.. be able to set a "lock start date".
This lock would persist during a page refresh or until check is removed. A check box below the date range/ segment drop down menu items would indicate that the date range set are locked. See screen shot attached.