This is one of those, "why didn't I think of that?" The concept is so simple, overlay data such as Panda updates on top of your Google Analytics. This way you can see if a Panda update correlates will a increase or decrease in your analytics.
It also works with Quantcast, along with Google Analytics. The developer, Oren Sol, said more are to come.
The overlay data points include:
- Google Panda Updates
- Google Penguin Updates
- Google Algorithm Updates
- Holiday Data
- Economic Data
Now, I do not know the data sources for the dates but I am sure they are close enough.
This comes as a free Chrome extension that you can download over here.
Here is the video demo:
Forum discussion at DigitalPoint Forums.
Note: This story was scheduled to be posted on this day, but was written earlier.