Commissions for direct-access brokers are calculated based on volume. The more shares traded, the cheaper the commission. The average commission per trade is roughly $5 per round trip (getting in and out of a position). While a retail broker might charge $7 or more per trade regardless of the trade size, a typical direct-access broker may charge anywhere from $0.01 to $0.0002 per share traded (from $10 down to $.20 per 1000 shares), or $0.25 per futures contract. A scalper can cover such costs with even a minimal gain.
Range trading, or range-bound trading, is a trading style in which stocks are watched that have either been rising off a support price or falling off a resistance price. That is, every time the stock hits a high, it falls back to the low, and vice versa. Such a stock is said to be "trading in a range", which is the opposite of trending. The range trader therefore buys the stock at or near the low price, and sells (and possibly short sells) at the high. A related approach to range trading is looking for moves outside of an established range, called a breakout (price moves up) or a breakdown (price moves down), and assume that once the range has been broken prices will continue in that direction for some time.
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.
A basic EMA crossover system can be used by focusing on the nine-, 13- and 50-period EMAs. A bullish crossover occurs when the price crosses above these moving averages after being below. This signifies that a reversal may be in the cards and that an uptrend may be beginning. When the nine-period EMA crosses above the 13-period EMA, it signals a long entry. However, the 13-period EMA has to be above the 50-period EMA or cross above it.
The price movements of any stock are posted throughout the trading day and summarized at the end of the trading day. For example, April 2, 2019, shares of Apple Inc. (AAPL) opened at $191.09 and closed at $194.02. During the day, as indicated in the "day's range" listed to the right of the closing price, shares dropped as low as $191.05—the intraday low—and hit a peak of $194.46—the intraday high.