Since this has come up elsewhere, I suppose I ought to repeat it here so that those with whom wants to "discuss" it are on the same page. Arguing about "edges" accomplishes nothing unless the participants are all talking about the same thing.
Your edge begins with the knowledge you gain through your research and testing that a particular market behavior offers a level of predictability that provides a consistently profitable outcome over time.
I insert the word "begins" because no amount of information or knowledge will constitute an edge unless one implements what he has learned through his research and testing. If he can't, or won't, then it's all just wishful thinking.