It means Independent Chip Model. This is a method of calculating your winnings based on the proportion of chips of each player when you are awarded prize money ( ITM ). Indeed, this principle is based on the fact that the chance that a player has to win the game is proportional to his amount of chips at a given time. It takes into account several variables and allows you to determine the risk/reward ratio on one hand. It generally consists of converting the amount of your stack into real money based on the payment structure (payouts).