my keywords are ranked top in google.com but past 30 days my keywords are ranking only in google.co.in.all my keywords are down in google.com. any changes in algorithm?
Google has been making changes in algo regularly and the latest changes were made on 17th Jan & 21 Jan. 17th Jan update influenced some percentage of queries in India and the UK region.
There has been a definite change in algorithm, but Google hasn't announced as of now. Sites' ranking have definitely suffered as a result.