Alexa ranking factor

How Alexa ranking a website? Which factors are consider by Alexa, while ranking a website?

I think alexa ranking is not that important ,you install alexa on ur browser and then visit ur site ,your ranking will be improve,...
Regards, Anup Kanwar.

Calculate according to your site popularity.

Just my notice if website is webmaster related alexa rank will be 4 times better than regular ones.

Alexa’s traffic rankings are based on the usage patterns of Alexa Toolbar users and data collected from other, diverse sources over a rolling 3 month period. A site’s ranking is based on a combined measure of reach and page views. The number of unique Alexa users who visit a site on a given day determines reach on the given day. Page views are the total number of Alexa user URL requests for a site. However, multiple requests for the same URL on the same day by the same user are counted as a single page view. The site with the highest combination of users and page views is ranked #1.