Buy Box Win Scorer
Will you win the Amazon Buy Box? Rate your listing based on the 5 key algorithmic factors: Fulfillment, Price, Speed, Stock, and Feedback.
Ranking Factors
Win Probability
High Rotation
Fulfillment Impact
FBA is giving you a massive boost (+35 pts).
Price Competitiveness
You are price competitive.
Verdict
You should own the box most of the time.
Execution Steps
Select your Fulfillment Method (FBA is king).
Enter your % Price Difference vs the lowest competitor.
Set your Shipping Time and Stock Level.
The Score indicates your probability of rotating into the Buy Box.
Pro Strategy
- If your score is <80, you must lower your price to compete.
- If your score is >95, you can likely RAISE your price slightly and still keep the box.
- Never run out of stock. Stockouts reset your sales rank momentum.
Core Concepts
Buy Box Rotation
Amazon rotates the Buy Box between eligible sellers based on their score. A score of 90 vs 85 might mean you get the box 80% of the day.
FBA Weighting
Fulfillment by Amazon is the single biggest factor. An FBA seller priced 2% higher often beats an FBM seller priced lower.
Landed Price
The algorithm looks at Price + Shipping. Ensure your comparison includes shipping costs.
What is Buy Box Win Scorer?
This tool approximates the Amazon A9 Buy Box algorithm using weighted factors derived from seller experiments. It emphasizes Fulfillment and Price as the dominant variables.
Best For
- • Troubleshooting why sales dropped.
- • Setting repricer rules.
- • Evaluating FBA vs FBM strategy.
Limitations
- • Amazon's actual algorithm is a black box and changes constantly.
- • Does not account for geo-location of inventory.
Alternative Methods
Buy Box Repricer
Simulates the price war dynamic specifically.
Industry Applications
See how this methodology generates real revenue uplift in different sectors.
FBA Switch
FBM seller losing sales.
Moved top SKUs to FBA.