Shows the latest average bookmaker margin (overround) by market type in a small table: mean and median margin in percent, with the number of bookmakers measured. The figures come from the open Bet Better daily margin index, a CC BY 4.0 statistics file that is updated every day; the module downloads the CSV, caches it (default 6 hours, configurable) and renders the most recent day. Options: cache length, show or hide the bookmaker count, show or hide the data credit line. No API key, no account, no tracking. Built for sports-analytics, statistics-teaching and consumer-information sites. Tested on Joomla 5.4; written for Joomla 4 and 5. Statistics only, not betting advice.