The theory behind any kind of lottery games is grounded on the premise of probability. Most of the people believe that one needs all the luck to win any lottery games such as pick 4. We dismiss that fact that after all it is numbers, a mathematical fact that can be analyzed and studied.
There are quite a lot of cheats and systems offered online nowadays for those who are fond of playing lottery games like Pick 4. The real secret of winning relies not on these systems actually but on the strategy of playing.