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Permlink Replies: 3 - Pages: 1 - Last Post: Dec 26, 2017 7:29 PM Last Post By: C. Gold
Mike Moores

Posts: 24
Registered: 01/15/17
Sales ranking
Posted: Dec 26, 2017 1:27 AM
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Apologies if this is a dumb question.
Does your sales ranking reflect sales during a specific period or is it cumulative?
Donna St Felix

Posts: 6,079
Registered: 09/18/13
Re: Sales ranking
Posted: Dec 26, 2017 1:58 AM   in response to: Mike Moores in response to: Mike Moores
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Mike Moores wrote:
Apologies if this is a dumb question.
Does your sales ranking reflect sales during a specific period or is it cumulative?

All I can say is that it is very fluky.
Selling zero for a few days, I jumped up 100,000 this morning from where I was last night.
Jackie Weger

Posts: 252
Registered: 05/13/13
Re: Sales ranking
Posted: Dec 26, 2017 10:31 AM   in response to: Mike Moores in response to: Mike Moores
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Your best best bet to understand Amazon algorithms is to read Let's Get Visible by David Gaughran. Ranking works on sales...but sort of of like this: The number of units sold yesterday has a half-life today...a book has to keep selling to hold a rank or move up in rank. That's all I know and I may not be on target. If you want to know how your book ranks day-to-day track it in https://tracker.kindlenationdaily.com/. It's free and provides graphs and if interested, the sales and price history of a book from the day it is published.
C. Gold

Posts: 1,068
Registered: 02/17/15
Re: Sales ranking
Posted: Dec 26, 2017 7:29 PM   in response to: Mike Moores in response to: Mike Moores
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A book sale spikes your rank. Then it hangs there for a while (maybe 2 hours?) before exponentially decaying. Each time you get a sale or KU borrow, it shoots up X amount according to an exponential chart and hangs then glides. So if you never sold a book before, 1 sale shoots you to 300k. A second sale would shoot you to 100k. A third sale to 80k. The whole graph looks something like this:

300,000 1
100,000 2
80,000 3
70,000 4
50,000 5
40,000 6
39,000 7
38,000 7

34,000 8

30,000 9
25,000 10

You lose about 2k an hour after it starts to glide.

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