a moving average is a calculation used to analyze data points by creating a series of averages
of different subsets of the full data set. In finance, a moving average (MA) is a stock indicator that
is commonly used in technical analysis. The reason for calculating the moving average of a stock
is to help smooth out the price data by creating a constantly updated average price.
This project, has 2 classes named stoke_indexes.moving_average.SimpleMovingAverage and stoke_indexes.moving_average.ExponentialMovingAverage that each has a method
that use to creat simple moving average of price array.
To use classes and functions, you should fill price arrayList with your own data (implement TODO) in constructure. you can read data from file and set it in price arrayList or you can get data from user input.