These developments heralded the appearance of "market makers": the NASDAQ equivalent of a NYSE specialist. A market maker has an inventory of stocks to buy and sell, and simultaneously offers to buy and sell the same stock. Obviously, it will offer to sell stock at a higher price than the price at which it offers to buy. This difference is known as the "spread". The market maker is indifferent as to whether the stock goes up or down, it simply tries to constantly buy for less than it sells. A persistent trend in one direction will result in a loss for the market maker, but the strategy is overall positive (otherwise they would exit the business). Today there are about 500 firms who participate as market makers on ECNs, each generally making a market in four to forty different stocks. Without any legal obligations, market makers were free to offer smaller spreads on electronic communication networks than on the NASDAQ. A small investor might have to pay a $0.25 spread (e.g. he might have to pay $10.50 to buy a share of stock but could only get $10.25 for selling it), while an institution would only pay a $0.05 spread (buying at $10.40 and selling at $10.35).
The first 9 successful trades produce $900 in profit. On the 10th trade, when the position is down $50, instead of except the loss the untrained trader purchases more shares at a lower price to reduce his cost basis. Once he is down $100, he continues to hold and is unsure of whether to hold or sell. The trader finally takes the loss when he is down $1,000.
Day traders are attuned to events that cause short-term market moves. Trading the news is a popular technique. Scheduled announcements such as economic statistics, corporate earnings or interest rates are subject to market expectations and market psychology. Markets react when those expectations are not met or are exceeded, usually with sudden, significant moves, which can benefit day traders.
This often means trading shares of companies that have just released breaking news, reported earnings, or have another fundamental catalyst that is resulting in above average retail interest. The type of stocks a day trader will focus on are typically much different from what a long term investor would look for. Day traders acknowledge the high levels of risk associated with trading volatile markets and they mitigate those risks by holding positions for very short periods of time.
Traditional investing – Traditional investing is a longer game and looks to put money in popular assets such as stocks, bonds, and real estate for long-term value appreciation. Realistic investment returns over a whole year are in the 5-7% range. Unless you are already rich and can invest millions, traditional investing returns too little to make much of a difference on a daily basis. However, the intelligent trader will also invest long-term.
Traders pay close attention to intraday price movements by using real-time charts in an attempt to benefit from short-term price fluctuations. Short-term traders typically use one-, five-, 15-, 30- and 60-minute intraday charts when trading within the market day. Typically, intraday scalping uses one- and five-minute charts for high-speed trading. Other intraday trading strategies may use 30- and 60-minute charts for trades that have hold times of several hours. Scalping is a strategy of transacting many trades per day that hopes to profit from small movements in a stock's price. The intraday trader may hold their positions for a longer period but still operate under high risks.
This trading strategy used to be defined as spread trading where you would take profits where small gaps expanded and contracted between the bid and the ask price for a stock. This strategy has now evolved to include technical indicators, support/resistance levels, and volume spikes to make round-trip trades lasting seconds to a few minutes. The basic idea of scalping is to take advantage of market inefficiencies using speed and high trading volume to create quick profits. Click here for more information on scalping.
Smaller moves, easier to obtain - A change in price results from imbalance of buying and selling powers. Most of the time within a day, prices stay stable, moving within a small range. This means neither buying nor selling power control the situation. There are only a few times which price moves towards one direction, i.e. either buying or selling power controls the situation. It requires bigger imbalances for bigger price changes. It is what scalpers look for - capturing smaller moves which happen most of the time, as opposed to larger ones.
When it comes to intraday trading, daily charts are the most commonly used charts that represent the price movements on a one-day interval. These charts are a popular intraday trading technique and help illustrate the movement of the prices between the opening bell and closing of the daily trading session. There are several methods in which intraday charts can be used. Know about some of the most commonly used chart.

Successful traders have to move fast, but they don't have to think fast. Why? Because they've developed a trading strategy in advance, along with the discipline to stick to that strategy. It is important to follow your formula closely rather than try to chase profits. Don't let your emotions get the best of you and abandon your strategy. There's a mantra among day traders: "Plan your trade and trade your plan."