This is a string of 6 digits that have been hitting for quite some time. At least one of the digits has hit. For instance, as I write this GA Midday's 6-digit string is 1-2-5-6-7-9. This string has had at least one of those digits hit in the last 56 draws.
One way to use this information is to realize that that string will "miss" sometime. It may take a long time or maybe today! So with that string the numbers that are not in it are 0-3-4-8. You can wheel the 4 digits for a possible win when the 6-digit string "misses". I call those 4 digits the 6-digit string breaker.
I have noticed that when the 6-digit string "breaks" or misses, what hits is a double many times. That makes sense since it takes only 2 digits to break the string.
Like many other techniques, this is just another "tool" to use to try to get a winner.