It's only a matter of belief. As for me, I don't belive in it. A voodoo that brings luck when gambling? Actually the luck itself is also a matter of belief. I do believe in luck but not with voodoo. This is the first time I've about this. Lucky charm is possible but voodoo? It sounds so scary.

If a person is lucky, then he's lucky. If it's in his fate to win, then it's in his fate.  I don't believe voodoo has the luck when gambling. Rather your strategy, analytical, mathematical skills and some luck.