The art of online investing successfully in stocks requires much technical expertise and knowledge. The necessary skill are more than what someone could learn within the four walls of a classroom. There is really no business school that can teach you enough such that you posses an analytical mind that can be used to forecast market trends and make decisions on the spur of the moment. Yet, this are some of the skill that you need in order to succeed in the stock market. Therefore, to build the necessary set of skills, you should consider getting a virtual stock exchange trading account.

The discipline of mathematical statistics and the measure of volatility of investments are example concepts that have a tendency to scare the average investor. The standard deviation based on the rate of return of an investment is a measure of the volatility of the investment and is a good representation of risk found in stocks and options. It is said in Wikipedia that Karl Pearson, Fellow of the Royal Society, established the discipline of mathematical statistics. Karl Pearson first used the term "Standard Deviation" in writing in 1894 subsequent its use in his lectures. Standard Deviation is considered vital when used for financial issues.