Technical Analysis is totally based on Price movements.
Indicators which you uses are based on Prices and Strengths
Market will move in which direct price will smell and will tell you before anything might be their is some results or news it will go in that direction where price is telling you.
Their is a FAMOUS saying by me PRICE COMES FIRST BEFORE NEWS their are various examples you can check on your SOCIAL MEDIA Pages.
Why Fundamentals Fails?
Fundamental tells you about stock movement in long term for taking entry and i.e. also a right entry it can be judged only by Technical Analysis or after understanding the structure of price.
So now you knew why technical analysis is important and how it helps you to make a better trader. Use technical analysis to cut your losses small and ride your winners for a longer time.