The trends that occurs most of the time is 3 upper and 3 Lower or 4 upper 2 lower and finally 4 Lower 2 upper in a game of 6 drawn numbers. If you are playing regularly the first step on making a power ticket is to play at least 3 sets of numbers containing those combinations.
Why waste money on all lower numbers when they just don’t occur that often? That’s why playing birthdates is a bad strategy your limiting yourself to mostly lower numbers with a upper cap of 31. The basic foundation of a power ticket to win the lottery is to know not to play to high or too low.