The evolution of the edge for me anyway has come to this: Its a multidimensional moving average of tendencies regarding price. If you watch a derivative enough, you will know the nuances in price action. That internal moving average you develop will tell you what its most likely next wave of ticks will be. When the price actually deviates from your internal moving average, its best to take notice and stop loss out or reverse.
That internal moving average takes into account almost every factor that your exposed to.
'gut feel'