This is very simple,and maybe it has been thought of many times, but I like the idea and results so far.
Divide the layout in to groups: 1-9, 10-18, 19-27, 28-36.
When a group has two hits in a row bet the other groups.
If lose take the loss and re-track.
If win re-track.
Could cover the zero also.
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This seems to go up and down as you can see below,so exit on a decent profit ;)
Spin #,Bankroll Balance
1,0
2,0
3,30
4,30
5,30
6,30
7,30
8,30
9,30
10,60
11,60
12,-30
13,-30
14,-30
15,-30
16,-120
17,-120
18,-120
19,-90
20,-90
21,-60
22,-60
23,-60
24,-60
25,-60
26,-60
27,-30
28,-30
29,-30
30,-30
31,-30
32,-30
33,-30
34,0
35,0
36,0
37,0
38,30
39,30
40,60
41,60
42,90
43,90
44,120
45,120
46,30
47,30
48,30
49,30
50,30
51,60
52,60
53,60
54,-30
55,-30
56,-30
57,-30
58,0
59,0
60,30
61,30
62,30
63,60
64,60
65,60
66,60
67,60
68,90
C
It looks like you would be screwed if you hit 3 losses in a row. What about playing the opposite way?