Historical Market Data refers to previous stock market activity that shows the fluctuating prices of stocks.
People who invest in stocks make use of this data to understand the current trends in the market, what causes them, how long they will last, and what may influence them.
This is known as Market Hypothesis.
By correctly hypothesizing about the status and future of the market, it becomes possible to create a buying and selling strategy that will yield a target profit for the investor.
Today on the Internet, you will find sites where you can get Historical Market Data for free.
However, free is not always a good thing, nor is it the safest.
Free market data records often do not contain anything beyond the most basic records (which you can see in the newspaper's business section anyway), nor do they offer advanced data analysis tools.
And notably, there is no one accountable for data errors.
Remember that good data is crucial.
You need to be very careful about the information you're getting and very careful about getting stock data for free The best services that offer the widest range of accurate Historical Market Data tools are available for a fair price.
This may be disappointing for some people who are used to getting things on the Internet for free.
But if you are serious about building AND protecting your portfolio, you will want to invest in a serious market data and trading software provider - one that has a good reputation and a solid track record.