What Exactly Is a Candlestick Chart?

A candlestick chart, also called a candle chart, is one of the most commonly used price charts in technical analysis. It uses a single 'candle' to display the open, high, low, and close prices for a given time period (e.g., 1 minute, 1 day, 1 week)^[1]. Simply put, one candlestick is a 'price snapshot' for that time unit. Think of it as taking a photo every period, recording where the price started, where it ended, and the highest and lowest points in between.

Compared to a simple line chart (which only connects closing prices) or a bar chart (which marks open and close with horizontal ticks), candlestick charts are more popular among traders because their colors and shapes are easy to read at a glance^[11]. A line chart only shows you the change in closing price, missing the intraday price fluctuations. A bar chart also shows open, high, low, close, but it's not as intuitive as a candlestick. The combination of a candle's 'body' and 'wicks' tells a little story about who had the upper hand between buyers and sellers.

What Do Candle Colors Mean? Red for Up, Green for Down, or Vice Versa?

Many people get confused by candle colors at first: in some software, red means up and green means down; in others, it's the opposite. In reality, colors are just a display preference set by the software—there's no fixed rule^[3]. It's like driving on the left in some countries and on the right in others, but the rule itself is consistent.

The only standard for determining a bullish or bearish candle is: if the close is higher than the open, it's a bullish candle (often shown in green or white to indicate a price increase); if the close is lower than the open, it's a bearish candle (often shown in red or black)^[3]. You can freely set the colors in your trading software, so don't let the colors mislead you—focus on whether the close is higher or lower than the open. For example, if a candle's close is ¥100 and its open is ¥95, it's a bullish candle, regardless of whether the software displays it as red or green.

What Do the Body and Wicks Represent?

A candlestick consists of two parts: the body and the wicks. The body is the wide rectangular part in the middle, representing the price range between the open and close^[2]. If the body is long, it means the price moved significantly; if the body is short, the open and close were very close. Think of the body as the 'battle result': a long bullish body means buyers won big; a long bearish body means sellers won big.

The wicks are the thin lines extending above and below the body: the top of the upper wick is the highest price during the period, and the bottom of the lower wick is the lowest price^[2]. The longer the wick, the wider the price range and the more intense the struggle between buyers and sellers^[4]. For example, a candle with a very long upper wick means the price shot up high but was pushed back down by selling pressure, leaving a 'long tail.' If a candle has almost no wicks, it means one side (buyers or sellers) dominated the entire period, and the price moved almost in a straight line.

What Does a Doji Candle Indicate?

A Doji is a special candlestick: the open and close are almost the same, the body is extremely small or even nonexistent, making it look like a cross or plus sign. It represents a near balance between buyers and sellers, with the market in a state of indecision^[5]. Imagine a tug-of-war where both sides are equally strong and the rope barely moves—the Doji reflects that stalemate.

If a Doji appears at the end of a clear uptrend or downtrend, it may signal a potential trend reversal. But note: a Doji itself is just a 'warning'—it needs the next candle to confirm the direction^[5]. For example, if a Doji appears after an uptrend and the next candle closes lower, the reversal is more likely. If the next candle continues to rise, it might just be a temporary pause.

How to Tell a Hammer from a Shooting Star?

A Hammer typically appears at the end of a downtrend: it has a small body at the upper end of the price range, a very long lower wick (at least twice the body length), and little or no upper wick. It shows that sellers once pushed the price very low, but buyers managed to pull it back near the open—a potential bullish reversal signal^[6]. The name is vivid: like a hammer, with the head (body) on top and the handle (lower wick) below, suggesting the market 'hammered out' a support at the bottom.

A Shooting Star is the opposite, appearing at the end of an uptrend: a small body at the lower end of the price range, a very long upper wick, and little or no lower wick. It shows that buyers once pushed the price very high, but sellers then drove it back near the open—a potential bearish reversal signal^[7]. It looks like a shooting star streaking across the sky, with the upper wick as its trail, hinting that upward momentum is fading. Both patterns need confirmation from the next candle.

What Are Engulfing Patterns and Morning Star?

A Bullish Engulfing pattern consists of two candles: first a bearish candle, then a bullish candle whose body completely covers (engulfs) the body of the previous bearish candle. It usually appears at the end of a downtrend, indicating that buyers have overpowered sellers^[8]. It's like a battle: on day one, sellers win; on day two, buyers not only win back but also occupy all of the sellers' territory.

A Bearish Engulfing pattern is the opposite: first a bullish candle, then a bearish candle whose body engulfs the bullish one, signaling weakening upward momentum^[9].

The Morning Star is a three-candle pattern: first a long bearish candle (continuing the downtrend), second a small-bodied star candle that gaps down, and third a long bullish candle (closing more than halfway into the first bearish candle's body). It is often seen as a signal that a downtrend is bottoming out^[10]. It's like the darkness before dawn: first a big bearish candle (night), then a small star (first light), and finally a big bullish candle (sunrise).

Can You Accurately Predict Stock Prices Using Only Candlestick Patterns?

No. Candlestick patterns are essentially empirical rules based on historical prices—they are not absolute prediction tools^[13]. Just like a weather forecast saying 'dark clouds may bring rain,' sometimes the clouds clear up. Professional educational resources generally advise that candlestick signals should be combined with volume, support/resistance levels, or other technical indicators like RSI or MACD for confirmation. Relying solely on a single pattern for trading decisions carries a high risk of false signals^[13].

Also, candlesticks can be applied to any time frame—1 minute, 5 minutes, daily, weekly—and the same price movement can look different on different time frames^[12]. For example, a daily chart might show an uptrend, while a weekly chart might show just a consolidation. So, candlestick charts are a great analysis tool, but not a crystal ball. Traders should use them as a reference, not the sole basis for decisions.