Technical analysis relies on four core tools that professional traders use to spot patterns in stock price movements and make trading decisions.
Moving averages smooth out price noise by calculating the average closing price over a set period. A 50-day moving average shows shorter-term trends, while a 200-day moving average reveals longer-term direction. When a stock price crosses above its moving average, traders interpret this as a bullish signal. When it drops below, bearish sentiment takes hold.
The Relative Strength Index (RSI) measures momentum on a scale from 0 to 100. An RSI above 70 suggests a stock is overbought and due for a pullback. Below 30 signals oversold conditions where a rebound may occur. Traders use RSI to identify entry and exit points rather than relying solely on price.
MACD (Moving Average Convergence Divergence) compares two moving averages to detect momentum shifts. It generates buy signals when the MACD line crosses above the signal line and sell signals when it dips below. This tool helps traders spot trend changes before they become obvious to the broader market.
Bollinger Bands create upper and lower boundaries around a 20-day moving average. When a stock price touches the upper band, it may be overbought. When it touches the lower band, it may be oversold. Bands that widen indicate increasing volatility, while narrowing bands suggest consolidation.
For retail investors, understanding these tools helps you read professional stock charts independently. You don't need expensive software. Most brokerages like Fidelity, Charles Schwab, and TD Ameritrade offer charting tools with these indicators built in for free or low cost. Paper trading (simulated trading) lets you practice using these tools without risking real money before you commit capital to actual trades.