What Is a Candlestick?
A candlestick is a visual representation of price movement over a specific period of time. Developed by Japanese rice traders in the 18th century and popularized in the Western world by Steve Nison in the 1990s, candlestick charts have become the default chart type for the vast majority of traders worldwide. Unlike a simple line chart that only connects closing prices, a candlestick displays four critical pieces of data for every time period: the Open, High, Low, and Close — collectively known as OHLC data.
The reason candlesticks dominate modern trading is simple: they compress enormous amounts of information into an easy-to-read visual format. In a single glance, a trader can determine the direction of price, the strength of momentum, whether buyers or sellers were in control, and where significant rejection occurred. Mastering candlestick reading is not about memorizing dozens of obscure patterns — it is about understanding the story that each candle tells about the battle between buyers and sellers.
The Anatomy of a Candlestick
Every candlestick has two main components: the body and the wicks (also called shadows or tails). The body is the thick rectangular portion in the middle of the candle. It represents the range between the opening price and the closing price of that period. The wicks are the thin lines that extend above and below the body. They represent the highest and lowest prices reached during the period.
HIGH (top of upper wick)
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|
┌───────┤ Upper Wick (Shadow)
│ │
│ ┌───┘
│ │
│ │ Body
│ │ (Open to Close range)
│ │
│ └───┐
│ │
└───────┤ Lower Wick (Shadow)
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LOW (bottom of lower wick)
BULLISH CANDLE (Green/White) BEARISH CANDLE (Red/Black)
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| Upper Wick | Upper Wick
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┌───┤ ┌───┤
│ │ │▓▓▓│
│ │ Close (top) │▓▓▓│ Open (top)
│ │ │▓▓▓│
└───┤ └───┤
| |
┌───┤ ┌───┤
│▓▓▓│ Open (bottom) │ │ Close (bottom)
│▓▓▓│ │ │
└───┤ └───┤
| |
| Lower Wick | Lower Wick
| |
LOW LOW
Bullish vs. Bearish Candles
The color of the candle tells you the direction of price movement during that period. A bullish candle forms when the closing price is higher than the opening price — meaning price went up. Bullish candles are typically colored green or white. A bearish candle forms when the closing price is lower than the opening price — meaning price went down. Bearish candles are typically colored red or black.
Understanding the direction is only the beginning. The size of the body and the length of the wicks provide deeper insight into market psychology. A large bullish candle with minimal wicks suggests strong buying conviction — buyers were in control from open to close and faced little resistance. Conversely, a small-bodied candle with long wicks on both sides indicates indecision — neither buyers nor sellers could gain a meaningful advantage.
Reading the Four Price Points
The Open is the price at which the candle began forming. It is the first traded price when that time period started. The High is the highest price reached during the period — it sits at the top of the upper wick. The Low is the lowest price reached during the period — it sits at the bottom of the lower wick. The Close is the last traded price before the period ended — it determines whether the candle is bullish or bearish.
By analyzing these four points together, you can infer a great deal about market sentiment. For example, if a candle opens near its low and closes near its high, buyers were dominant throughout the entire period. If a candle opens near its high but closes near its low, sellers overwhelmed buyers. If a candle has a small body but very long wicks, the market tested both extremes and rejected them both — this signals extreme indecision.
Single Candle Patterns
While complex multi-candle patterns exist, the most important patterns to learn first are single candle formations. These patterns require only one candle and can provide powerful signals when they appear at the right location on a chart.
The Doji
A doji forms when the open and close prices are virtually identical, creating a candle with a very small or nonexistent body. The shape resembles a cross or plus sign. A doji signals indecision in the market — neither buyers nor sellers won the period. When a doji appears after a strong trend, it often warns of a potential reversal. The longer the wicks, the more significant the indecision.
The Hammer
A hammer has a small body at the top of the candle and a long lower wick that is at least twice the length of the body. There is little to no upper wick. The hammer is a bullish reversal signal that typically appears at the bottom of a downtrend. The long lower wick shows that sellers pushed price down aggressively, but buyers stepped in and pushed it back up before the close. This rejection of lower prices suggests that selling pressure may be exhausting.
The Shooting Star
The shooting star is the bearish mirror of the hammer. It has a small body at the bottom of the candle and a long upper wick at least twice the length of the body. It appears at the top of an uptrend. The long upper wick shows that buyers tried to push price higher but were rejected — sellers overwhelmed them and forced price back down. This signals potential bearish reversal.
The Spinning Top
A spinning top has a small body centered between long upper and lower wicks. It looks similar to a doji but has a slightly larger body. The spinning top indicates indecision and a potential shift in momentum. When found at the end of a strong trend, it suggests the trend may be losing steam.
Body Size: What It Tells You
The size of the candlestick body is one of the most important elements to understand. A large body — whether bullish or bearish — indicates strong conviction. When the body is large relative to recent candles, it means one side of the market (buyers or sellers) dominated the period with conviction. Large bullish candles are often called marubozu when they have little to no wicks, meaning buyers controlled the entire period from open to close.
Small bodies, on the other hand, indicate weak conviction or indecision. The market could not establish a clear direction. When you see a series of candles with progressively smaller bodies, it often means the current trend is losing momentum and a reversal or consolidation may be imminent.
Wick Length: The Story of Rejection
Wicks tell you where price went but was rejected. A long upper wick means price tried to go higher but was pushed back down — sellers rejected higher prices. A long lower wick means price tried to go lower but was pushed back up — buyers rejected lower prices. The longer the wick, the stronger the rejection.
Traders who understand wicks can identify areas of significant supply and demand. A candle with a very long lower wick that closes near its high is essentially saying: "Sellers tried their hardest, but buyers won decisively." This is the logic behind the hammer pattern and similar rejection-based setups.
Putting It All Together
Candlestick reading is not about memorizing a dictionary of patterns. It is about understanding the three core elements: direction (bullish or bearish), body size (conviction level), and wick length (rejection level). When you combine these three elements, you can read the story of any candle without needing to recall a single pattern name.
Start by observing candles on higher timeframes like the daily or four-hour chart, where each candle represents more data and is therefore more reliable. As you build your candlestick reading skills, you will begin to notice recurring themes — rejection wicks at key support and resistance levels, indecision candles at the end of trends, and large conviction candles that kick off new moves. These observations will form the foundation of your technical analysis toolkit.
In the next lesson, we will build on this candlestick knowledge by learning about chart patterns — formations made up of multiple candles that signal continuation or reversal of the prevailing trend.