Suppose that the fields of 3, 6, 9, 12, 15, 18 have been filled in as the first case of at least six winning numbers SIDE BY SIDE.
This pattern then has resulted in your first plein hit. How did you reach that goal?
Simply by figuring out that the pattern could be on its way. If 6, 9, 12, 15, 18 had come, but neither 3 nor 21, you had to wager those to numbers in that area. No matter in which order the five numbers had come and independent of the number of repeats had turned up there. Imagine that 9 was the only missing number among the six numbers. Then you had to bet only 9 there.
Now the goal of at least six fields filled in has been reached in one column. We now should reach the goal in one more column. Reaching the goal in two columns should give us two Straight Up hits.
As mentioned repeats (crosses) should flock together side by side. Our goal with them is not SIX side by side anywhere in the columns. FIVE (or more) should do. Several tests suggest that this pattern comes before long. If the pattern may come in the very NEXT spin, go for it.
Imagine that 7, 10, 16, 19, have reappeared. 13 has only come once. Then 13 could come and end the session. Wager this number.
The pattern with crossed out numbers (repeats) does not always come after the two other hits.