So called technical analysis, which for me is 'chart hunches', is hit and miss. Nobody has to take any notice of it, its partly subjective, and for me i do it as a hobby and because i suck at fundamental analysis. I think investors who take no notice of charts are almost as mad as pure chartists. Buying and selling at the right price is important to most, but fundamentalists tend to dismiss charts and market sentiment.
There are facts recorded on a price chart: highs and lows, opens and closes, volume. I would also class peaks and troughs, trendlines, support levels as facts, but maybe not. Why shouldnt these facts imply something about buyer/seller sentiment, and therefore about probable (not certain) future buying/selling?