Any false method, including "trend" following, will yield success to some degree, otherwise it would be negatively correlated to the market, which is an edge. Trends exist only in the past, so traders on trend have made money in the past, but only as luck has provided for them.
The theory of market efficiency implies, "If there's a method in the public domain, it doesn't work."
One can prove both of these wrong by specifying a reliable method, composed exclusively of publicly available techniques, that can be applied to past price to determine a usefully large number d such that |p1-p0| is greater than or equal to d, where p1 is a near-future price and p0 is the current market price.
I'm still waiting for someone to show me that reliable method.