Stock trading is a business if one understands the concept of Risk and the returns associated with the trade. A trade happens if there is a deal between the buyers and sellers. Buyers buy the stock expecting the price to go up. Sellers sell the stock expecting the price to go down. If a trader initiates a position by BUYING the stock , it is called a LONG position. When he is exiting the existing LONG position, it is called LONG UNWinding. If a trader initiates a position by SELLING the stock, it is called SHORT position. When he is exiting the SHORT position, it is called SHORT COVERING. Fundamentals are important but the data is not freely available for everyone, therefore one needs to go towards Technical analysis. The premise is that Stock price and volumes reflect the news in the market and we use Price and volumes to understand Demand and Supply.