To be honest, sounds like a completely bullshit for me.
your Positive energy is not going to affect the computer's hash algorithm in any way and if you think that you can manipulate it you are completely wrong.
People are searching for answers where there are no answers, and that's a good example for that.
I can't see a reason to believe that those things actually matter.
Positive energy is of no use as far as you are playing online gambling because online gambling is completely different from the gambling you play in your real life and definitely there are more chances of your losing than winning because you cant chose your opponent as you can chose in real casinos and if you would be unlucky enough that you got an opponent bigger than your rank, you will be in deep trouble.