The Amazon sales rank, updated hourly, is a relative representation of how products are selling in comparison to others in their primary category (niche). The lower the rank, the better a product is selling. A sales rank of 1 is therefore the best selling item in its category.
Amazon Sales Ranks in Practice
Here's one of our standard charts tracking the sales and price changes for Napoleon Hill's best-seller, entitled Think and Grow Rich (Hint: hover over the chart for more data, click on 'Sales Rank' or 'Price (New)' to show or hide lines, click on the print icon):
Here's a chart from our Price Tracker showing a combination of price, discount and sales in one convenient chart for a selection of the best gaming PCs:
While there are many theories about how the Amazon sales rank is calculated, and how many sales certain average ranks indicate, the best way to obtain accurate sales figures is to use an accurate, hourly tracker (like RankTracer).
Ideally, you want sales rank tracking combined with a price tracker (like RankTracer). This allows you to chart Amazon sales & prices together and get change alerts for both sales and prices in virtual real-time. Try out a demo or start tracking Amazon sales & prices.