It is known as the most famous search engine and browser in the world. Everyone, who has the Internet, has heard about it. The most popular operating system installed on most smartphones around the world.

If you want to invest in stocks, you first need to understand how the stock market works. For the investor it is particularly important to know what causes the quotes to vary. After all, the stock market prices fluctuate greatly, even for a second they may go up or down. Volatility is a probability of stock prices’ change.