When I look up books on Amazon they have arrows beside them. green and red ones. The green ones are pointing up and the red ones are pointing down. Are those like rattings by ppl who have read those books, or something?
That is the ranking change basically over the past 24 hours. If a book starts getting attention and is being sold at higher rates than it would be going up therefore more people are going to get the book. Kind of like music in a website like (billboards top 100) music changes places weekly. So it gives you an estimate on how good or bad it's gotten over the past few days. Green good, red bad.
Ohh and if it has no arrow, its simply because the rating is the same as last time.
Oh, ok. Thank you very much for answering :)