DATA SMOOTHING

This is to remove noise in a data set. It uses algorithm to allow important patterns to stand out. It can be done in different ways like random walk, simple exponential, moving average or seasonal exponential smoothing. It can predict trends like the securities prices. .The random walk model is commonly used to describe the behavior of financial instruments such as stocks. Some investors believe that there is no relationship between past movement in a security's price and its future movement. Technical and fundamental analysts disagree with this idea; they believe future movements can be extrapolated by examining past trends.