For Main Organic Keywords Report
First, go to the "Organic Keywords" report under "Organic Search":
There, you can compare the ranking history difference between two time periods of your choice. You can also filter for specific keywords you'd like to compare.
For each keyword, you can also click the Chart button to see the history of how your pages have ranked for this keyword on Google SERPs over time. Highlighted in Pink, you can also change the duration to view the chart, and the number of pages that can be compared to on the graph.
You can also select and deselect specific pages that can be seen on the chart:
For Legacy Organic Keywords Report
First, go to the "Organic Keywords" report under the Legacy section:
Then, click the "Show History Chart" button on the right side of the page.
For each particular keyword, you can see which position your website ranked for on Google's SERPs and how it changed.
To see the graph only within top 10, 20, 50 or 100 of search positions, switch between corresponding modes in the top right corner.
Under the graph, you can see the list of all your website’s pages which rank for this particular keyword. Check/uncheck some of them in order to add/remove their curves from the graph.
Another cool feature is the ‘Add Domain to Compare’ button. Insert your competitor's domain there to see which of their pages rank for this same keyword and where they are placed on the graph.
On top of this, ranking history can be found in our Rank Tracker. There you can track position history of any keyword from the day you’ve added it to the dashboard.
Are there any limitations?
Lite: See positions history in the top 20 results and up to past 6 months.
Standard: See positions history in the top 100 results and up to past 6 months
Advanced: See positions history in the top 100 results as well as the full history dating back to June 2015. .
Agency: See positions history in the top 100 results as well as the full history dating back to June 2015.