The first key to successful swing trading is picking the right stocks. The best candidates are large-cap stocks, which are among the most actively traded stocks on the major exchanges. In an active market, these stocks will swing between broadly defined high and low extremes, and the swing trader will ride the wave in one direction for a couple of days or weeks only to switch to the opposite side of the trade when the stock reverses direction.
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 swing traders assess trades on a risk/reward basis. By analyzing the chart of an asset they determine where they will enter, where they will place a stop loss, and then anticipate where they can get out with a profit. If they are risking $1 per share on a setup that could reasonably produce a $3 gain, that is a favorable risk/reward. On the other hand, risking $1 to make $1 or only make $0.75 isn't as favorable.

Some of the common mistakes that scalpers make are poor execution, poor strategy, not taking stop-losses, over-leveraging, late entries, late exits and overtrading. Scalping generates heavy commissions due to the high number of transactions. A per-share commission pricing structure is beneficial to scalpers, especially for those who tend to scale smaller pieces in and out of positions.
Unlike a number of day trading strategies where you can have a win/loss ratio of less than 50% and still make money, scalp traders must have a high win/loss ratio. This is due to the fact that losing and winning trades are generally equal in size. The necessity of being right is the primary factor scalp trading is such a challenging method of making money in the market.
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.

Of course, you still have to factor in losses. Smaller gains can only produce growth in your portfolio if losses are kept small. Rather than the normal 7% to 8% stop loss, take losses quicker at a maximum of 2% to 3%. This will keep you at a 3-to-1 profit-to-loss ratio, a sound portfolio management rule for success. It's a critical component of the whole system since an outsized loss can quickly wipe away a lot of progress made with smaller gains.
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Liquidity - The liquidity of a market affects the performance of scalping. Each product within the market receives different spread, due to popularity differentials. The more liquid the markets and the products are, the tighter the spreads are. Some scalpers like to trade in a more liquid market since they can move in and out of large positions easily without adverse market impact. Other scalpers like to trade in less liquid markets, which typically have significantly larger bid-ask spreads. Whereas a scalper in a highly liquid market (for example, a market maintaining a one-penny spread) may take 10,000 shares to make a 3 cent gain ($300), a scalper in an illiquid market (for example, a market with a 25 cent spread) may take 500 shares for a 60 cent gain ($300). While there is theoretically more profit potential in a liquid market, it is also a "poker game" with many more professional players which can make it more difficult to anticipate future price action.
Another risk of swing trading is that sudden reversals can create losing positions. Because you are not trading all throughout the day, it can be easy to be caught off guard if price trends do not play out as planned. To decrease the risk of this happening, we recommend issuing stop orders with every new position. Stop orders can help you “lock-in” your gains and can also help you cut your losses.
Frequency and costs: A novice scalper has to make sure to keep costs in mind while making trades. Scalping involves numerous trades — as many as hundreds during a trading session. Frequent buying and selling is bound to be costly in terms of commissions, which can shrink the profit. This makes it crucial to choose the right online broker. The broker should not only provide requisites like direct access to markets, but also competitive commissions. And remember, not all brokers allow scalping. 

Scalpers use technical analysis but within this style, can be either discretionary or system traders. Discretionary scalpers will make each trading decision in real time (albeit very quickly), whereas system scalpers follow a scalping system without making any individual trading decisions. Scalpers primarily use the market's prices to make their trading decisions, but some scalpers also use one or more technical indicators, such as moving averages, channel bands, and other chart patterns.

This is usually reserved for traders working for larger institutions or those who manage large amounts of money. The dealing desk provides these traders with instantaneous order executions, which are particularly important when sharp price movements occur. For example, when an acquisition is announced, day traders looking at merger arbitrage can place their orders before the rest of the market is able to take advantage of the price differential.
Individuals who attempt to day trade without an understanding of market fundamentals often lose money. Technical analysis and chart reading is a good skill for a day trader to have, but without a more in-depth understanding of the market you're in and the assets that exist in that market, charts may be deceiving. Do your due diligence and understand the particular ins and outs of the products you trade.

Read books and articles on trading. Consider getting mentoring from someone you have followed and who's method you feel would work with your personality and needs. Invest in your own education, not trade signals you pay for each month or expensive subscriptions—these only serve to make you reliant on someone else. Invest in yourself from the start. That way, no matter what happens you have the skills to get the job done, on your own.
Suppose a trader employs scalping to profit off price movements for a stock ABC trading for $10. The trader will buy and sell a massive tranche of ABC shares, say 50,000, and sell them during opportune price movements of small amounts. For example, they might choose to buy and sell in price increments of $0.05, making small profits that add up at the end of the day because they are making the purchase and sale in bulk.
The bid–ask spread is two sides of the same coin. The spread can be viewed as trading bonuses or costs according to different parties and different strategies. On one hand, traders who do NOT wish to queue their order, instead paying the market price, pay the spreads (costs). On the other hand, traders who wish to queue and wait for execution receive the spreads (bonuses). Some day trading strategies attempt to capture the spread as additional, or even the only, profits for successful trades.[18]
Day traders generally use margin leverage; in the United States, Regulation T permits an initial maximum leverage of 2:1, but many brokers will permit 4:1 leverage as long as the leverage is reduced to 2:1 or less by the end of the trading day. In the United States, people who make more than 4 day trades per week are termed pattern day traders and are required to maintain $25,000 in equity in their accounts.[1] Since margin interest is typically only charged on overnight balances, the trader may pay no interest fees for the margin benefit, though still running the risk of a margin call. Margin interest rates are usually based on the broker's call.
The most significant benefit of intraday trading is that positions are not affected by the possibility of negative overnight news that has the potential to impact the price of securities materially. Such news includes vital economic and earnings reports, as well as broker upgrades and downgrades that occur either before the market opens or after the market closes.
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.