Say for example a ‘holy grail’ or at least a consistently profitable method of trading were to be found and shared with everybody, what would this mean? If say everybody traded it?
If you want to take that to its most extreme an suggest that literally everyone used a given system there would never be any trades done as there would never be anyone to take the opposing side of a trade. But then you have a paradox because a trade that is the holy grail can’t really be the holy grail if no one can ever trade it.
Do you mind if I ask why you want to know?