I think it may come down to context. One man's noise can be another man's signal, depending on his method, frame of reference and so on. But I am personally disinclined to believe that there are people for whom there is never any noise in the market. If there were no noise, then every moment would be tradable because, by definition, it would be all signal. And this would suggest an always-in approach, switching from long to short and so on. I have difficulty accepting this premise. Perhaps I am missing something?

