Fantasy points are calculated based on the point system set for the fantasy game by the club/league game admin. Every club/league fantasy game has a point system of its own and there can be a different point system for Batters/All-Rounders/WK and a different one applicable for Bowlers.
Fantasy points are calculated based on 27 categories for each performance of a player in a match he/she plays in, as long as that match has been added into the fixtures at the appropriate gameweeks (lockout periods).
See Point System and Score Updates under Rules for details on all 27 point scoring categories.