Here's a simple system which so far I haven't seen fail, flat betting.

Bet up to a maximum of the 5 "hottest" numbers. How many to bet on depends on how many numbers share the same number of hits; the idea is to add numbers (starting from the top of the list) until picking any more would leave some numbers which have hit the same number of times.

For example, on the screenshot in my previous post, you bet on 24 and 7, but no more because the numbers which have hit twice, if added, would have you betting on more than 5 numbers. Suppose the list had been this:

24 --3

7 --3

2 --2

21--2

8 --2

22 --1

12--1

etc

Then it would be ok to bet the top 5 numbers (up to #8) because numbers which have hit twice only go down as far as the 5th number in the list, so you would be betting the maximum amount of numbers (5). However, if the list looked like this:

24 --3

7 --2

2 --2

21--2

8 --2

22 --2

12--1

etc

You would only be betting one number (#23), because numbers which have hit twice go down to the 6th numbers, and as you don't leave any numbers which have hit the same number of times as numbers you've already picked, you just bet on the first number. If the 2's started from the first on the list, like this:

24 --2

7 --2

2 --2

21--2

8 --2

22 --2

12--1

That would be a no-bet situation, because the numbers which have hit twice extend down to the 6th (if they had only gone down to #8, you would bet all 5).

Hope that's clear.