A stock chart is not a crystal ball. Charts show where a stock has been — price over time, volume, sometimes additional indicators. Technically-minded investors use that history to make probabilistic guesses about where it's going. What's not up for debate: understanding what you're looking at when a chart is in front of you is basic literacy worth having before you buy anything.
The candlestick chart — what each candle means
The most common chart format. Each candle represents one period — day, week, hour, whatever timeframe you've selected — and shows four prices:
- Open: where the stock started that period
- Close: where it ended
- High: highest price hit during the period
- Low: lowest price hit during the period
A green candle means close was higher than open — stock went up. A red candle means close was lower than open — stock went down. The thin lines extending above and below are called wicks — they show the high and low range beyond the open/close body.
Volume — the context layer under price
Those bars along the bottom represent how many shares traded in each period. High volume on an up day confirms buying conviction. High volume on a down day confirms selling pressure. Low volume on a move in either direction suggests less conviction — the price moved but not many people participated, which sometimes signals the move isn't meaningful or sustainable.
Always look at volume when assessing a price move. It's the context that tells you whether a move is real or just noise. This matters especially on earnings reaction days — a big move on high volume is confirmed. The same move on half-normal volume is suspect.
Moving averages — the 50DMA and 200DMA
A moving average is the average closing price over a specified number of days, plotted as a line. The 50-day moving average (50DMA) and 200-day moving average (200DMA) are the most widely watched.
- Stock trading above its 200DMA: generally considered in a long-term uptrend
- Stock trading below its 200DMA: suggests a downtrend
- Golden cross: 50DMA crosses above 200DMA — widely cited bullish signal
- Death cross: 50DMA crosses below 200DMA — bearish signal
These don't predict the future reliably. But they describe where price sits relative to longer-term trend, which is useful context when deciding whether to buy or add to a position.
Support and resistance
Support is a price level where a stock has historically bounced — buyers have consistently shown up there, creating a floor. Resistance is where the stock has historically struggled to break through — sellers emerge there, creating a ceiling. When support breaks it often becomes resistance. When resistance breaks it often becomes support.
Millions of traders watching the same levels creates self-fulfilling dynamics — not magic, just where large institutional orders and stop-losses cluster. Understanding support and resistance helps you set better entry points when buying individual stocks rather than buying blind into a price that's been rejected three times.
The 52-week high and low
A stock near its 52-week high is a fundamentally different situation from one near its 52-week low. Neither is automatically a buy or sell signal — but position relative to the year's range tells you something about momentum and how the market has been viewing the company. Breakouts above the 52-week high on high volume are one of the more studied bullish patterns. Stocks grinding near 52-week lows warrant understanding why before buying.
What charts can't tell you
Whether the business is good. Whether the valuation is reasonable. Whether earnings next quarter will beat or miss. Charts reflect price history only. Technical analysis is most useful as a timing tool within a fundamental investment thesis — not a substitute for having one. Before reading the chart, understand the company's P/E ratio, revenue and profit trends, and market cap. The chart shows you when. The fundamentals tell you whether.
Pro tips
- Use multiple timeframes. A daily chart shows short-term context. A weekly chart shows medium-term trend. Always zoom out before zooming in — a stock that looks weak on a daily chart might be in a strong long-term uptrend on the weekly.
- Volume confirms moves. A breakout above resistance on low volume is suspect. The same breakout on 2x average volume is more meaningful.
- Don't use charts in isolation. The best use of technical analysis is alongside fundamental research. If a stock you've analyzed fundamentally looks undervalued and is also trading near strong support, that's a more confident entry than either signal alone.
A 5-minute chart checklist before buying any stock
- Is the stock above or below its 200DMA?
- Where is the 52-week high and low — is current price closer to which end?
- What does volume look like on recent big moves — was it confirmed?
- Are there obvious support levels below current price that could limit downside?
- Read next: How to buy your first stock
Frequently asked questions
What is the best timeframe to use on a stock chart?
Depends on your purpose. Long-term investors typically use weekly or monthly charts to see multi-year trends. Swing traders use daily charts. For most buy-and-hold investors, the daily chart with 50DMA and 200DMA overlaid gives enough context without overcomplicating analysis.
What does trading above the 200-day moving average mean?
The current price is above the average closing price of the past 200 trading days. Generally interpreted as the stock being in a longer-term uptrend. Below the 200DMA suggests downtrend. Simple trend indicator — context from earnings and fundamentals still matters more than any technical line.
What is RSI?
Relative Strength Index — a momentum indicator measuring how overbought or oversold a stock is on a 0–100 scale. Above 70 is considered overbought, below 30 oversold. Useful as one input, not as a standalone signal. Stocks can stay overbought for extended periods during strong trends.
Does technical analysis actually work?
Genuinely contested. Academic research on pure technical analysis is mixed — some patterns show statistical significance, most don't hold up after transaction costs. The most defensible use for individual investors is as a timing tool to improve entry and exit points on positions already justified by fundamental research, not as the primary reason to buy or sell.
What is a candlestick chart?
A price chart showing four data points per time period: open, close, high, and low. Green candles show price rose; red candles show it fell. The body shows open-to-close range; the wicks show the full high-to-low range. Most stock screeners and brokerage platforms default to candlestick charts.