What is a candlestick in trading?
A Japanese candlestick is a way of drawing a period’s price using four data points: open, high, low and close. The body runs from the open to the close, and the shadows mark the extremes. Its color and shape show at a glance who controlled that period: buyers or sellers.
How a candle forms
Each candle sums up one period: a minute, an hour, a day or a week, depending on the timeframe you choose. Drawing it takes four prices, known as OHLC: open, high, low and close.
- Body: the rectangle between the open and the close.
- Shadows or wicks: the thin lines that reach up to the period’s high and down to its low.
- Color: if the close is above the open, the candle is bullish (usually green or white); if it’s below, it’s bearish (red or black).
Colors are a convention of each platform, and you can change them. What doesn’t change is the logic: the body tells you who won the period, and the shadows tell you how far the battle went.
Example: reading a candle with numbers
Suppose a sample stock opens the day at $25.00, rises to $26.10, drops to $24.70 and closes at $25.80.
- Since the close (25.80) is above the open (25.00), the candle is bullish.
- The body measures $0.80.
- The upper shadow measures $0.30 (from 25.80 to 26.10): buyers pushed higher but couldn’t hold that price into the close.
- The lower shadow measures $0.30 (from 24.70 to 25.00): there was a moment of selling pressure that got absorbed.
Conclusion: a day dominated by buyers, with some rejection near the top. That reading, repeated candle after candle, is the foundation of all chart analysis.
What a candle’s shape tells you
More than the color, what matters is the proportion between the body and the shadows:
- Long body, short shadows: one side was in control almost the whole period.
- Long upper shadow: the price rose, but sellers pushed it back down before the close.
- Long lower shadow: the price fell, but buyers brought it back. That’s the idea behind the hammer.
- Almost no body: open and close nearly equal, a sign of indecision. That’s the doji.
These pieces are the building blocks of one-, two- and three-candle patterns, such as the engulfing pattern.
One candle, several timeframes
A daily candle contains all of that day’s hourly candles, and a weekly candle sums up five daily candles. That’s why the same stock can show a bullish weekly candle with two or three bearish days inside it.
An example: if in a given week a sample stock opens Monday at $40.00, hits a low of $38.50 on Wednesday and closes Friday at $42.00 with a high of $42.30, the weekly candle is bullish with a $1.50 lower shadow, even though Wednesday was a bad day. Switching timeframes doesn’t change the prices; it changes the level of detail you read them at.
The most common mistake
Reading a candle in isolation, without looking at where it appears. A candle with a long lower shadow in the middle of a sideways range says almost nothing; the same candle after several weeks of decline and at support can be meaningful. Context (the trend, nearby levels and volume) and confirmation from the candles that follow carry more weight than the shape of a single candle.
Another practical detail: a candle isn’t finished until its period closes. While the daily candle is still open, its shape can change completely.
Ben · the MentorA candle is a sentence, not a book. Before you draw conclusions, read the candles that came before it and wait for it to close.
Learn it in depth in lesson 2.1: Chart types and Japanese candlesticks
In the course you practice it with real charts, pop quizzes and an exam that tells you whether you really got it. Start free with lesson 1.1; no card required.
Frequently asked questions
What does the color of a candlestick mean?
It shows whether the period closed above or below its open. By convention, green or white is bullish (a close higher than the open) and red or black is bearish. You can change the colors on your platform; the logic stays the same.
What timeframe should I use for candlesticks?
It depends on your horizon. Someone who holds trades for several days usually looks at daily candles; someone who trades intraday uses minute candles. What matters is that the timeframe matches how long you plan to hold the trade.
Do candlesticks work for any market?
Yes. Stocks, ETFs, futures, currencies and crypto can all be drawn as candlesticks, because they all have an open, high, low and close in each period. Reading the body and shadows works the same way in all of them.
Related terms
Educational content from The Trading Path. Not a recommendation to buy or sell any asset.