If you lay £10 at 5.0 you win £10 when the horse loses and pay £40 when it wins. Available lay prices are shown in pink. The amount you could lose is the liability.
Lay: what it means in exchange trading
Betting that a selection will not win: acting as the bookmaker.
18+. Trading on exchanges carries real risk and many people lose money. Set limits before you start. Support: BeGambleAware, GAMSTOP.