Market Momentum Score (MMS) is a daily breadth indicator that measures the percentage of liquid Pokémon trading cards trading above their 30-day moving average. The metric focuses on cards meeting minimum liquidity thresholds, price requirements, and price history. MMS is calculated both as an overall market metric and broken down into 4 price tiers ($10-50, $50-100, $100-200, $200+), revealing where momentum is concentrated across different market segments.