Quote from: ego on Jul 14, 08:28 AM 2018Every serious system player is interested in an objective method, giving him information whether his system has a certain value and is going to produce a net profit in the long run.

Beside the "Statistical Ecart" and other test options, with which we will deal in one of the next issues of Basics, "the Van Keelen Test" is a simple measuring procedure, with which the player can determine the chances of success or failure of his system.

Much easier and give much more accurate answer is simply calculating distance from your prediction number (a number which you think that will come now ) til real result in a concrete spin. Say if you think that will come 27 but come 8 - you simply calculate how far is that 8 from 27 and get 5 pockets. If instead 8 come 2, counts and again get 5 only in other direction.
In a simple way, we can to directions not pay attention.
Then count average from all distances and look which number we got - absolutely random must give you a number 9.
More spins you count nearer to 9 if the play is random you must get.

I use slight different - more complex counting and can in 10-20 spins detect I have an edge or not, but the idea is the same.
If in about 20-30 spins you will get number around 6 - you predict with the almost sure advantage.

Try this way and you see that it show true

This will be very very close in an airball machine