A steamer is a horse whose odds shorten (get shorter / lower) as money arrives for it; a drifter is one whose odds drift (lengthen / get bigger) as support drains away. Tracking which horses are steaming and drifting is the heart of horse racing market intelligence.
Steamer = a price shortener
When a horse is heavily backed, layers shorten its price to balance their book. A runner moving from, say, 6.0 (5/1) in the morning to 3.5 (5/2) at the off is a clear steamer — the market has decided it is more likely to win than first thought. On our live market movers board steamers are shown in green with a downward arrow.
Drifter = a price lengthener
A drifter does the opposite: a horse easing from 4.0 (3/1) out to 7.0 (6/1) is losing support. Drift can mean the stable is quiet, the going does not suit, or simply that the money is going elsewhere. Persistent drifters are shown in red.
Why the move matters more than the price
A short price tells you what the market thinks now; the movement tells you what is changing. A horse that opens favourite and drifts all morning is often a weaker proposition than its odds suggest, while a quiet outsider being steadily backed can be the day’s most informed move. We measure each runner’s journey from the morning forecast through to the off across both the bookmaker odds and the Betfair Exchange.
Frequently asked questions
A steamer is a horse whose odds shorten (become smaller) as money is placed on it, signalling growing market confidence that it will win.
A drifter is a horse whose odds lengthen (become bigger) because support is draining away from it in the betting market.
Steamers win more often than randomly chosen runners because the move reflects informed money, but the price usually shortens to reflect that, so the value is often gone by the off. The movement is a signal, not a guarantee.
