I do call superstitions as "personal trick" to trigger our luck factor. Fortunately or unfortunately I have lots superstitions but my luck also not getting triggered everyday, it means I guess I need to follow some set of superstitions for particular day.
Trick? Something new, I come across for the first time but, definitely a good comparison. People are having lost of strategies for their gambling and superstitions must be one of them. You may call them as trick or strategy or whatever still what is your achievement out of them is the big question here.
I bet if your time is good your superstitions will work for you to make you lucky which is exactly similar to all other gambling strategies. Then definitely superstitions is also a kind of trick, I must agree with you. As usual a trick may work for us or may not, a superstitions too.
Take for instant those who depends solely on voodoo for wining in gambling, when they have whatsoever charms they think that can make them win a game. They depend on it without bothering to consider calculating their games.
Luck factor is the final winner here. It may in your side when you bother nothing or when you calculate all your superstitions. It must be a universal truth : Luck is God's touch. That is the reason you will not be able to control it. Enjoy it when it is in your favor and accept the defeat when not in your favor.