Why my curve for alexa is showing circle in the middle

[gaskill]

hi guys
i'm still 1 month user for alexa and i've got the alexa add-ons for firefox....it shows the traffic graph at the bottom right like this image
http://i36.tinypic.com/2luzwwx.gif
some one told me that's because you are out of the 100,000

is that right?

thanks 4 the help