Users are ranked based on their trading efficiency: the lowest average buy price and the highest average sell price. The raw score is calculated as (Average Sell Price - Average Buy Price), then multiplied by 1000 to make it more readable. For example, a raw score of 0.0250 becomes 25.0. A "+" is added to positive scores for clarity. Higher scores indicate better trading performance. Only users with at least one completed buy and sell order are included.