Best price: Watford pay $2.10, Charlton Athletic pay $3.65, a draw pays $3.50 (the best of 16 bookies we checked). $100 on Watford returns $210.
Fair chance (our read of the prices, with the bookies' cut taken out): Watford about 5 in 10, a draw about 3 in 10, Charlton Athletic about 3 in 10.
How much the bookies keep: about $7.45 of every $100 bet on this game.
Since betting opened: the price has barely moved.