[ncboiler]

Look at the pot size and compare it to the bet. In this case ask yourself...do I have a 1 in 5 chance of winning this pot? Consider any reads you have of the villian. I've never played 10/20 so I have no idea how they play. If it's anything like 1/2 then I call it. What are you scared of? Villain having A/Q or A/J? If he has A/K he bets the turn.