1) When a number has 4 hits with gradually increasing intervals from hit to hit bet that its next hit will happen in equal or less spins than its greatest interval. Example: 1st hit <---- 23 spins ------> 2nd hit <----- 45 spins -------> 3rd hit <----- 70 spins ------> 4th hit In such case we would bet that number for up to 70 spins because that was the largest interval. The logic is that after 2 increasing intervals in delay there will be at least 1 reduced in regards with the 3rd largest interval. 2) When only 1 number has not shown count how many spins is being absent, let's say that it's missing for 150 spins so in such case bet it for the next 150 spins, if it was 130 spins then bet it for 130 more. The important is to begin betting AFTER all other numbers have been shown at least once, use the duration which this happens as the limit for betting the last number. 3) Chart the spins for the longest absent number, let's say that the last remaining number hits after 200 spins, thus the longest interval from hit to hit was 200 spins and now we are going to bet that the specific number will not miss for more than 200 spins for its 3rd hit.