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.
The volume indicator could be interpreted as the “fuel tank of the major trading machine.” Some argue that the volume indicator cannot be used with trading in the forex market. This is because there is no “central exchange” so how can it be read effectively? Another argument is that the volume that you see for Forex is the “Tick” volume that occurs. This means you are not seeing the entire volume that is being traded at the time like you would with stocks.
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.

Scalping is the shortest time frame in trading and it exploits small changes in currency prices.[1] Scalpers attempt to act like traditional market makers or specialists. To make the spread means to buy at the Bid price and sell at the Ask price, in order to gain the bid/ask difference. This procedure allows for profit even when the bid and ask don't move at all, as long as there are traders who are willing to take market prices. It normally involves establishing and liquidating a position quickly, usually within minutes or even seconds.

Due to the increased leverage and quick returns, day trading can be extremely profitable. The downside is that if done incorrectly, it can also be extremely unprofitable. Due to the high volatility of day trading, some people have labeled Day Traders as gamblers or adrenaline junkies. However, many people make a very consistent and comfortable living from day trading. Some even make millions of dollars each year.
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.
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.