Technical analysis looks at actual trades where bulls and bears have put their money where their collective mouths are.There is no revision of data.There is no ambiguity.There is no mystical divining of the future. All market and stock selection is based on current,not past,price performance,the predictable behavior of market participants,and the dynamics between markets over time.
Trends exist.Information is slowly disseminated to the public in an imperfect manner,and as the public acts on the information,the markets move.They continue to move until either the last group has acted or an outside influence,such as news,ends the trend.Sounds a lot like physics,does it not? A body in motion tends to remain in motion.
Look at another aspect of the analysis.Behavior is a key component of the analysis.When similar market conditions occur,market participants react in similar ways.This is how the patterns and measurements within technical analysis are created.