Line Movement & Steam explained

Odds are living prices. They open from a bookmaker's model, then move as bets arrive, team news lands and sharper operators reposition. A shortening price ('steaming in') signals money backing that outcome; a drifting price signals the opposite. Most movement is routine rebalancing, but rapid, synchronised shortening across many books — steam — often marks respected money entering the market.

Movement matters to a value bettor in two ways. Taken early, a price that later steams in usually means you beat the closing line. And a price that drifts after you bet is a warning your view disagrees with informed money. Tracking our published price against later movement is one of the health checks behind the screener's signal column.