Technical Analysis 101: Charts, Patterns & Indicators

What Is Technical Analysis?

Technical analysis is the study of historical price and volume data to forecast future stock movements. Unlike fundamental analysis, which examines a company's financial health, technical analysis focuses entirely on market data: prices, volume, and the patterns they form. The core belief is that all relevant information, including fundamentals, is already reflected in the stock price.

Technical analysis originated in Japan in the 18th century with rice trading and was popularized in the Western world by Charles Dow, co-founder of the Wall Street Journal. Today, it is used by traders and investors worldwide as a complement to, or substitute for, fundamental analysis.

Chart Types

Line Charts

The simplest chart type connects closing prices with a continuous line. Line charts give you a clean view of the overall price trend but lose intra-day information. They are useful for getting a quick read on long-term direction.

Bar Charts

Bar charts show the open, high, low, and close (OHLC) for each time period. A vertical line represents the range from low to high, with small horizontal ticks marking the open (left) and close (right). Bar charts convey more information than line charts but can look cluttered over long periods.

Candlestick Charts

Candlestick charts are the most popular chart type among traders. Like bar charts, they show OHLC data, but they use a colored "body" to represent the range between open and close. A green (or white) candle means the close was above the open (bullish), while a red (or black) candle means the close was below the open (bearish). The thin lines above and below the body are called "wicks" or "shadows" and show the high and low.

Candlestick charts make it easy to quickly visualize buying and selling pressure within each period.

Support and Resistance

Support Levels

Support is a price level where buying interest is strong enough to prevent the stock from falling further. When a stock repeatedly bounces off a certain price level, that level becomes established support. The more times support is tested and holds, the stronger it becomes. However, when support finally breaks, it often leads to accelerated selling.

Resistance Levels

Resistance is the opposite: a price level where selling pressure prevents the stock from rising higher. Stocks often stall or reverse at resistance levels. When resistance is broken with strong volume, it frequently becomes new support, and the stock may move significantly higher.

How to Identify Support and Resistance

Look for price levels where the stock has repeatedly reversed direction. Round numbers like $50, $100, or $200 often act as psychological support or resistance. Previous highs and lows are natural support and resistance levels. Moving averages also serve as dynamic support and resistance.

Trend Analysis

Identifying Trends

An uptrend is characterized by a series of higher highs and higher lows. A downtrend shows lower highs and lower lows. A sideways trend, or range, occurs when the stock moves between established support and resistance without a clear direction.

Trendlines

A trendline is drawn by connecting two or more price points. An uptrend line connects successive lows, while a downtrend line connects successive highs. The more touches a trendline has, the more significant it is. A break of a well-established trendline often signals a change in direction.

Common Chart Patterns

Head and Shoulders

This reversal pattern consists of three peaks: a higher middle peak (the head) flanked by two lower peaks (the shoulders). A "neckline" is drawn connecting the lows between the peaks. When the price breaks below the neckline after the right shoulder forms, it signals a potential downward move. The expected price decline is roughly equal to the distance from the head to the neckline.

Double Top and Double Bottom

A double top forms when a stock reaches the same high twice and fails to break through, creating an "M" shape. It signals a potential reversal from an uptrend to a downtrend. A double bottom is the inverse, forming a "W" shape and signaling a potential bullish reversal.

Triangles

Ascending triangles have a flat resistance line and rising support, suggesting bullish pressure. Descending triangles have flat support and declining resistance, suggesting bearish pressure. Symmetrical triangles show converging trendlines and can break in either direction, typically continuing the prior trend.

Cup and Handle

This bullish pattern resembles a tea cup when viewed from the side. The stock forms a rounded bottom (the cup), followed by a small pullback (the handle), before breaking out to new highs. The cup should be U-shaped rather than V-shaped, and the handle should retrace no more than a third of the cup's depth.

Essential Technical Indicators

Moving Averages

Moving averages smooth price data to reveal the underlying trend. The two main types are the Simple Moving Average (SMA), which gives equal weight to all periods, and the Exponential Moving Average (EMA), which gives more weight to recent prices.

Common moving averages include the 50-day and 200-day. When the 50-day crosses above the 200-day, it forms a "golden cross," a bullish signal. When it crosses below, it forms a "death cross," a bearish signal. Many traders also use the 20-day EMA for short-term trend identification.

Relative Strength Index (RSI)

RSI is a momentum oscillator that ranges from 0 to 100. Readings above 70 suggest overbought conditions, while readings below 30 suggest oversold conditions. RSI divergence, where price makes a new high but RSI does not, can signal a potential reversal.

MACD (Moving Average Convergence Divergence)

MACD measures the relationship between two moving averages, typically the 12-day and 26-day EMA. The MACD line is the difference between these two averages. A 9-day EMA of the MACD line serves as the "signal line." Bullish signals occur when the MACD crosses above the signal line, and bearish signals occur when it crosses below.

Bollinger Bands

Bollinger Bands consist of a 20-day moving average with two bands plotted two standard deviations above and below. When the bands contract (squeeze), it signals low volatility and a potential breakout. Prices touching the upper band suggest overbought conditions, while prices touching the lower band suggest oversold conditions.

Volume

Volume is the number of shares traded and is one of the most important technical indicators. Rising volume during a price advance confirms the uptrend. Declining volume during a rally suggests weakening momentum. Breakouts from patterns should ideally occur on above-average volume to be considered reliable.

Putting It Together: A Simple Technical Analysis Process

Identify the trend: Use moving averages and trendlines to determine whether the stock is in an uptrend, downtrend, or range.

Find key levels: Mark significant support and resistance levels on the chart.

Look for patterns: Check if any recognizable chart patterns are forming near key levels.

Confirm with indicators: Use RSI, MACD, and volume to confirm or question the signals you see in the price action.

Plan your trade: Decide your entry point, stop-loss level, and profit target before placing any trade.

Limitations of Technical Analysis

Technical analysis is not a crystal ball. Patterns fail, indicators give false signals, and unexpected news can override any chart setup. The best technical analysts use it as one input among many, combine it with fundamental analysis where possible, and always manage risk through position sizing and stop-losses. Past price patterns suggest probabilities, not certainties.