Important stuff at Alexa Rank

I observed these days that alexa rank modified his algoritm and the pages no longer can be manipulated so easy. The problem is that a site that have a big number of visitors on a month ( around 500 daily) have now a weak alexa rank ( 4 milion and something), and some unvisited blogs, but with material got an alexa rank around 300.000.

Of course this thing isn’t apply for all the sites, but are some cases that this algoritm, even if it is impoved, seems that isn’t got anything new than last time. Just bad things.