You can set notifications for terms that their rank Increased (jump) or Decreased (drop) in compare to yesterday/a week ago/a month ago:
At the left menu, under Reports, click Reports Center -> Notifications -> Drop/Jump Notifications .
At the top-right click Add New Report.
• Type a name for the Notification in the Report Name field and set the report's settings you wish.
• On "Report Type", select if to generate an on demand report or to create a scheduled one.
• Set your preferred settings and Select the scheduled notification type.
• Fill the filtering settings for the terms that you want the notification to be triggered for.
• Set your preferred Columns & Sorting.
• You will be notified of any drops/jumps for the URLs/Terms you've set in your filtering settings (unless you selected a "Check now (instant export)" report).