The Historical Graph shows any companies you are tracking that have ranked for the specified keyword in positions 1-100 in the past 30 days. 

The chart displays their daily evolution, this graph is most useful to determine the affects of your competitor’s website changes on their SEO ranking.  

By default, the graph displays a 30 day range however, you can customize the view from the date drop-down on the right. 

Did this answer your question?