Here's a method on the even chances.
Note the preferred EC in 2 columns or 'streams'
I will use red and black
1 2
R R
R B
B R
B B
B R
Wait until an EC repeats twice in a stream whilst the other one hasn't repeated. Then simply bet the other stream to repeat - it's never far away!
Here's an example
1 2
R R
B R one repeat in stream 2
R R
B B
R B. two repeats in stream 2 and none in 1. Now bet for repeat in stream 1
R R. win!
If it goes :
R
R
R. I don't count that as two repeats, however
R
R
R
R. I do count as 2 repeats
Hit rate is very good, best of luck