If we predict , no matter how... be it vb, or ds or any combinaton of these, we obtain our reference number ( visual key). Next task is to chart reference to outcome. For it we count how many numbers are between our visual key and outcome number.
It can be done on casino card . Often these cards do have an image of the roulette numbers ring.
For charting, we use zero number as our starting point. Let's say we focus on spins when ball goes clock wise. 32 becomes distance of 1, 15 becomes distance of 2... and so on.
Example. Our reference is 10 and result is 16. There are 3 numbers between. To chart 3 number distance we put point on number 19. ( we always start from zero). ...
After some spins we will see if there are any zone of relative distances that do collect more then expected. We would have to add this distance to our prediction ( refference/ visual key) to determine best betting position in current situation.