The sentimental analysis is a method to analyze and predict stock behavior based on opinion mining.
Unlike technical analysis that is based on hard numbers and formulas, and unlike fundamental analysis that looks for the underlying forces affecting the market, a sentimental analysis is based on the notion that stock prices and public opinions regarding that stock are not only tied together but can affect each other in both directions.
Sentimental analysis mines and processes information from public sources such as social media (e.g. Twitter) and news. Just like fundamental and technical analysis, sentimental analysis can give accurate predictions about stock movements.