the technical analysis will show you the behavior of the currency and let you predict its future movements but we are talking more about graphs and values, and it´s that the market expresses the emotions and confidence of its investors, this indicates that some news of great importance that allows to have great influence in them can make big changes of tendencies.
This works but never a perfect indices to analyze and predict the market. In past years the slogan was 'buy the news' but the trend is changing. The whole 2018 gave some better market news but no positive market reaction, showing the space is young and we are still learning. Trend in over some years will help in better predictions in coming years.