The idea of superstition in gambling is quite ridiculous because there's actually nothing you can do to attract luck or Manover the circumstancesto your advantage..I'm from a part of Africa where most people believe in doing charms to help them get lucky in whatever they are doing bet it trading, gambling or business..in the aspect of gambling it's governed by a principle of risk and reward, all you can do is hope to get lucky.. blowing whistles, wearing a specific color of shirt or whatever would not change anything, this is an insane thing to think about.
Quite interesting, consider you are from Africa. It seems there are actually many people from Africa here in the forum... Anyways, to me it seems there is a pattern with comes to all kind of superstitions surging in developing countries, like this in Africa and Latin America, and not so much in western Europe, for example.
Here in my country there is a belief that one can attract good luck by wearing yellow underwear during the festivities of New year, like literally just by wearing yellow undies. There is also another superstition which says one will get money and there will be no lack of food in the coming year if one throws coins and rice around during the the welcoming of the new year. It is something I have seen personally and it is quite curious, to say the least.
Just imagine someone throwing rice and coins around during a new year party.