Technical analysis assumes that price reflects all that is known about a company at any given point in time. Of course, the disciplines can be combined. History repeats in many walks of life and price action that represents supply and demand, driven by the psychology of market participants, should be no different. Therefore it makes sense to me, that analysis of historical data is really a search for repeatable patterns or occurrences within that data that may repeat in real time over and over. It is a process of stacking the odds in your favour rather than one of prediction. It is a process of utilising probabilities and statistics.