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).
Trading: Spotting the trend and momentum comes in handy for a scalper who can even enter and exit briefly to repeat a pattern. A novice needs to understand the market pulse, and once the scalper has identified that, trend trading and momentum trading can help achieve more profitable trades. Another strategy used by scalpers is countertrend. But beginners should avoid using this strategy and stick to trading with the trend.
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Trend Trading is a strategy where it is believed that a stock that is rising will continue to rise, or a stock that is falling will continue to fall. You enter the trade in the direction of the trend and exit once the price breaks this trend. Trend trading usually incorporates the use of trend and support/resistance lines. Click here for more information on Trend Trading.
Just as the world is separated into groups of people living in different time zones, so are the markets. If you start trading on the Cac 40 at 11:00 ET, you might find you’ve missed the best entry signals of the day already, minimising your potential end of day profit. So, if you want to be at the top, you may have to seriously adjust your working hours.
Many professional money managers and financial advisors shy away from day trading arguing that, in most cases, the reward does not justify the risk. Conversely, those who do day trade insist there is profit to be made. Day trading profitably is possible, but the success rate is inherently lower because of the complexity and necessary risk of day trading in conjunction with the related scams. Moreover, economists and financial practitioners alike argue that over long time periods, active trading strategies tend to underperform a more basic passive index strategy, especially after fees and taxes are taken into account.
Buying on margin can greatly increase your gains or losses. Brokerages usually allow a bigger margin percentage for a day trading account but reduce the amount of margin available for positions held overnight. Normally a day trading account must have a minimum of $25,000 and can buy on margin at a rate of 4 to 1 giving you $100,000 in buying power, which is called day trader buying power. That number drops to 2 to 1 for positions held overnight, which can be called overnight margin buying power. That means that if you have 100% of your margin being used during the day, you must exit at least half of your positions before the close of the trading day.
Scalpers need to be disciplined and need to stick to their trading regimen very closely. Any decision that needs to be made should be done so with certainty. But scalpers should also be very flexible, because market conditions are very fluid and if a trade isn't going as expected, they'll need to fix the situation as quickly as possible without incurring too much of a loss. 
The following are several basic trading strategies by which day traders attempt to make profits. In addition, some day traders also use contrarian investing strategies (more commonly seen in algorithmic trading) to trade specifically against irrational behavior from day traders using the approaches below. It is important for a trader to remain flexible and adjust techniques to match changing market conditions.[11]

Finally, keep in mind that if trading on margin—which means you're borrowing your investment funds from a brokerage firm (and bear in mind that margin requirements for day trading are high)—you're far more vulnerable to sharp price movements. Margin helps to amplify the trading results not just of profits, but of losses as well if a trade goes against you. Therefore, using stop losses is crucial when day trading on margin.
Scalping is a trading style that specializes in profiting off small price changes, generally after a trade is executed and becomes profitable. It requires a trader to have a strict exit strategy because one large loss could eliminate the many small gains the trader worked to obtain. Having the right tools such as a live feed, a direct-access broker and the stamina to place many trades is required for this strategy to be successful.

Scalping is a trading style that specializes in profiting off small price changes, generally after a trade is executed and becomes profitable. It requires a trader to have a strict exit strategy because one large loss could eliminate the many small gains the trader worked to obtain. Having the right tools such as a live feed, a direct-access broker and the stamina to place many trades is required for this strategy to be successful.
The goal of swing trading is to identify the overall trend and then capture gains with swing trading within that trend. Technical Analysis is often used to help traders take advantage of the current trend in a security and hopefully improve their trades. Day trading and swing trading involve specific risks and commission costs that are different and higher than the typical investment strategies.
This strategy is mostly only done by day traders. It requires that you have access to one to several real-time news sources and can make split second decisions. News and rumors can provide large amounts of volatility and high emotion creating great opportunities if traded properly. The biggest challenge of trading this strategy is anticipating the market’s reaction to the news and how it effects the price of the stock. Click here for more information on trading news and rumors.
Scalping proves to be an extremely effective strategy – even for those who use it purely as a supplementary strategy. The same goes for Forex 1-minute scalping. However, it is important to understand that scalping is hard work. Scalpers are rewarded for quantitative work – the more Forex scalping they perform, the larger the profits they achieve. In the end, the strategy has to match not only your personality, but also your trading style and abilities.
Different markets require different amounts of capital to day trade. Stocks are popular, but also the most capital intensive. If you want to day trade stocks in the US, the absolute minimum you need is $25,000. And you'll actually need more because you need to keep your balance above $25,000. Starting with $30,000 or more is recommended. The stock market provides up to 4:1 leverage on day trades.
ECN/Level 2 quotes: ECNs, or electronic communication networks, are computer-based systems that display the best available bid and ask quotes from multiple market participants and then automatically match and execute orders. Level 2 is a subscription-based service that provides real-time access to the Nasdaq order book composed of price quotes from market makers registering every Nasdaq-listed and OTC Bulletin Board security. Together, they can give you a sense of orders being executed in real time.
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