I did not think this could be done - but i use a wheel signature with a bias and random algorithm and i strike above 50% at all times.
Sure there will be varaince and fluctation, but this is the best i ever seen with a 50/50 bet situation.
This method play numbers with physical parameters.
WWWWWLWWWWWWWWLWWWWWLWLWLLWLWWWWWWLW