So - You guys know how it is a pain to figure out what is a good or a bad rank in a given category. Well guess what, I felt it and decided to do something about it.
I created a Google Extension that will allow you to see the percentage rank that each item on Amazon has. It's very basic, but it will allow you to quickly tell if an item is a good rank or a bad rank in a given category.
If you have any questions, let me know!