Greetings Earthlings,
I have come from a faraway galaxy to analyze that which you call Alexa.
On my far superior planet, we have much better systems than Alexa Rank to determine internet traffic.
Alexa is the best you puny earthlings have, and I need US dollars to buy a ticket home from Nasa, so my job is to analyze Alexa.
Thus far, I have determined Alexa is like your stock market. The higher the alexa rank, the more valuable the website. However, the ups and downs are enough to drive mere mortals to the brink of insanity.
Fear not, cyberspace traveler! Knowledge lies within.