The tools found here monitor perhaps thousands of keywords to show whether Panda or Penguin updates have started before other users even begin discussing them.
Mozcast – Tracks Google algorithm changes on a daily basis. They use special methods called Delta10 and Delta100. Thanks to these methods, they constantly monitor the top 10 results for 1,000 keywords and compare them daily. The results are presented to followers as a type of temperature reading. Stormy weather indicates that significant changes have been made to the Google algorithm and that there has been a major change in search engine results within the last 24 hours.
SERPs Volatility Index – Checks the indexing status of thousands of sites daily. This allows you to see fluctuations occurring in the Google and Yahoo indexes. This tool provides average values by showing you 30 and 90-day fluctuations. SEO experts really like checking sudden index variabilities in Google.
Algoroo – This tool intelligently monitors Google algorithm changes by tracking irregularities in the rankings of thousands of determined keywords. When the boxes are red, it means the values are high, Google algorithm changes are on the way, and search engine rankings have changed for a large portion of the top keywords.
In addition to these, let’s not forget the SerpMetrics tool, which offers results only for the US.
Source: Blog Dünyası