Originally posted by Rosenzweig hello, can one tell if one's opponent is currently logged into the site? thanks
The green dot only means a person has made a move within the past ten minutes, if that feature is not turned off. They can disable the green dot in their settings.
If they logged off immediately after moving there could still be a green dot for ten minutes, while they are actually already gone.
So to answer your question, there is no way to know if someone is currently logged on or not.