About 3 months ago one of my sites lost half of it's daily visitors from google. That lasted for a month and a half and then it came back like nothing happened. Stayed that way for a while and then again half of visitors gone, for 10 days. Comes back again. Lasts for about 15 days and today it crashes again to half of it's usual daily visitors. Look at the graph, it's straight and then just falls and straight again. Doesn't let me post an image. 1fyOFjM jpg on imgur Wtf is happening? The site is quite old so it's not google dance. Must be some kind of link penalty?