[NYS_Eric]

QUESTION: What is the time cycle used in Amazon's calculations? Do the top seller lists get generated from a rolling 24-hour period, a rolling 1-week period, something else? That can make a huge difference in how popular something really is.

[COEXERJ145]

I'm thinking it is 24 hours. About a week ago Unfit for Command fell to #2 for one day. Some book about how to makes sales jumped to #1 and disappeared just as quickly as it had appeared. I bet some companies ordered a bunch all at once and it was enough to make it #1 for that one day.