What causes 7-Pack rank to Sink?

[Bishop]

Hi everybody-

My 7-Pack rank has tumbled down from #4 to #6 in the last couple of days. I checked my google webmaster stats and everything is the same (not sure if that influences Google +).

Any idea what could be causing the decline?

 

[Linda Buquet]

Impossible to guess without seeing the listing.

Could be an algo change. Could be a couple competitors did something and leapfrogged you which pushed you down.

Totally guessing in the dark without being able to see the listing and get history of any changes you've made recently.