Sales Spy tracks the inventory levels of most products on Amazon. By tracking inventory levels on a daily basis, we can deduce how many units are being sold each day. For example, if an item you are tracking has 100 units in stock today but only 80 units in stock tomorrow, our tool would record 20 sales for that 24 hours period. In that way we can compile sales history on that product as well as do projections based on real sales.
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