First, sellers need to analyze the characteristics of “unpopular” styles based on a large amount of data statistics, so as to establish an exit mechanism and promptly remove products with rapidly declining rankings. Generally speaking, the process from a decrease in sales to a rapid decline in ranking is: sales decrease → traffic decrease → sales eventually reach 0 → ranking rapidly declines. As shown in Figure 3-9, it is a sales ranking diagram of 6 products with rapidly declining rankings randomly selected on the Amazon platform (the horizontal axis is the number of days, and the vertical axis is the ranking value). It should be noted that the change from small to large in the ranking value indicates that the sales of the product is on a downward trend. Because on the Amazon platform, the smaller the ranking value, the greater the sales volume (for example, if a product’s sales ranking is 1000, its sales volume must be higher than that of a product ranked 5000).
Generally speaking, when there are no orders, there is a certain pattern for the decline in the sales ranking of a product, and the ranking value will increase at a rate of about 3000/day. Therefore, sellers can establish the following product selection exit mechanism: if the ranking value of a product increases by about 30,000 on average every day within x days (x can be any value from 3 to 30: for highly competitive categories, the value range of x can be appropriately expanded), the product can be determined as an “unpopular” product and will not be considered in the product selection range. For example, if the sales ranking value of a product increases by 30,000 on average every day within 15 days, the product can be determined as an “unpopular” product.