The Basics of 4D
System Number - Refers to a bet on all the possible permutations of a 4-digit number,
e.g. the number 1234 has 24 permutations (1234, 2341, 3412, 4123…).
Direct Number - Refers to a bet on a specific set of 4-digit number
SYSTEMS OF 4D :
EXAMPLE OF 4D PATTERN: