IQR (Interquartile Range)

IQR is the Interquartile Range — the difference between the 25th and 75th percentiles of a distribution. It captures the middle 50% of observations. A narrow IQR indicates tight market consensus on price; a wide IQR signals condition-driven variance, brand-mix variance, or low liquidity. Bagonomics uses IQR to bound the visible range on every variant page and to filter outliers before computing the median (1.5×IQR Tukey fence).