a high/low-odd/even strategy

[RouletteGhost]

On my way into work today I thought of a strategy and I glanced at past spins and it performed well flat betting

Here is how it works:
If the next number is low/odd, the next spin bet all low/even and high/odd numbers for an 18 number bet

Examples
Last number      What to bet next
17                       All low/even and high/odd
32                      All high/odd and low/even
27                     All high even and low/odd
6                       All low/odd and high/even

Essentially you bet the opposite in same side high/ low then the opposite of that on other half

[RouletteGhost]

making a new thread, found a better one