A stop-loss order is designed to limit losses on a position in a security. For long positions, a stop loss can be placed below a recent low, or for short positions, above a recent high. It can also be based on volatility. For example, if a stock price is moving about $0.05 a minute, then you may place a stop loss $0.15 away from your entry to give the price some space to fluctuate before it moves in your anticipated direction.
A market index tracks the performance of a group of stocks, which either represents the market as a whole or a specific sector of the market, like technology or retail companies. You’re likely to hear most about the S&P 500, the Nasdaq composite and the Dow Jones Industrial Average; they are often used as proxies for the performance of the overall market.
The use of borrowed money “levers” or exaggerates the result of price movement. Suppose the stock moves to $200 a share and you sell it. If you had used your own money exclusively, your return would be 100% on your investment [($20,000 -$10,000)/$10,000]. If you had borrowed $5,000 to buy the stock and sold at $200 per share, your return would be 300 % [(20,000-$5,000)/$5,000] after repaying the $5,000 loan and excluding the cost of interest paid to the broker.

Day trading is the act of buying and selling a financial instrument within the same day or even multiple times over the course of a day. Taking advantage of small price moves can be a lucrative game—if it is played correctly. But it can be a dangerous game for newbies or anyone who doesn't adhere to a well-thought-out strategy. What's more, not all brokers are suited for the high volume of trades made by day traders. Some brokers, however, are designed with the day trader in mind. You can check out our list of the best brokers for day trading to see which brokers best accommodate those who would like to day trade.
The stock market is made up of exchanges, like the New York Stock Exchange and the Nasdaq. Stocks are listed on a specific exchange, which brings buyers and sellers together and acts as a market for the shares of those stocks. The exchange tracks the supply and demand — and directly related, the price — of each stock. (Need to back up a bit? Read our explainer about stocks.)
PEG ratio -- Companies grow at different rates, and failure to take this into account is one of the key shortcomings of the P/E ratio. The price-to-earnings-growth ratio, or PEG ratio, levels the playing field. Simply divide the company's P/E ratio by its projected earnings growth rate. For example, a company with a P/E of 30 and a 15% expected growth rate would have a PEG ratio of 2.0. Like the P/E ratio, the PEG ratio is most useful for comparing companies in the same industry but with different growth rates.
Day trading tips can come in a variety of forms. Each trader might want something different – from free stock tips, to tips on tax when day trading. On this page, we have tried to collate as many useful tips as possible, including our “top 10”. These range from psychology to strategy, money management to videos. So from beginners to advanced traders, we explain a range of free tips that can help intraday traders.
News events and earnings reports can change the perceived value of a company. Because the stock market functions as an auction, prices sometimes need to adapt for a trade to occur. When there are more sellers than buyers, the price will go down. Alternately, a stock that has more who want to buy than sell will experience a price increase. Buyers and sellers can be individuals, corporations, asset management companies, or others. Price fluctuations can be dramatic in just one day.
Dollar-cost average: This sounds complicated, but it’s not. Dollar-cost averaging means investing a set amount of money at regular intervals, such as once per week or month. That set amount buys more shares when the stock price goes down and fewer shares when it rises, but overall, it evens out the average price you pay. Some online brokerage firms let investors set up an automated investing schedule.
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