Traffic figures as measured by Alexa result from both the amount of visitors ("reach ") and the number of pages viewed by each visitor, as counted by Alexa toolbars. 3 month average states that your site ranked number 2139604 on average during the last 3 months (let 's say from early January until late March), according to Alexa. 1 month average states that your site ranked number 967,342 on average last month (March). In other words, March was better for your site than January and February, according to Alexa. Higher traffic = lower rank = better rank. 7 day avg states that your site ranked number 1,261,415 on average during the last week. For yesterday, no data available (that means Alexa is in process to collect them or figures are too small to be reported). EDIT A last point: All above figures are estimates from Alexa. Real figures may be quite different. For real figures of your own site, use tools such as google analytics and similar ones.
Thank you jose for the info, what surprises me that sometimes alexa updates my rank in 3 days and sometiems my take longer than 2 weeks ...
I like the new version of Alexa, looks nice Wish they had a better way of determining their rankings though!