Does it exist? According to technical measurements, an aleatory succession of elements always tend to promote groups where anyone could say: Bad luck!
The same for positive actions, like a game where you cannot consciously play and for that reason it's unfair. It goes out of your reach, so what's the matter! Anyone should learn to avoid strange misconceptions about metaphysical convergences, because if you think so, perhaps it's better to find another explanation based in numerical terms.
Some people use talismans or other gear. Anyway it's difficult to believe in specific objects having magical powers, capable of modifying the actions that normally occur. We stick with the viewpoint that good or bad luck is just an opinion because even a tragedy could lead to a resolution, more pronounced than without precedence.