Recently, I’ve been reviewing candlestick patterns again and noticed that many traders still have a superficial understanding of this set of tools. In fact, candlestick charts were invented by Japanese rice merchants hundreds of years ago and weren’t introduced to Western analysts until 1989. Now, they have become one of the most essential tools in technical trading.

Why are candlestick charts so important? Essentially, they provide the most intuitive display of market sentiment behind price movements. Each candlestick contains four key pieces of information—opening price, closing price, highest price, and lowest price. A green candlestick indicates an upward move, while a red one indicates a decline. But the real skill lies in analyzing the “body” and “shadows” of the candlestick.

The length of the candlestick body reflects the strength balance between buyers and sellers. If the body is long and the shadows are short, it indicates one side has strong control, increasing the probability of trend continuation. Conversely, if the body is short and shadows are long, it suggests a tug-of-war between buyers and sellers, market hesitation, and a higher risk of reversal. A long upper shadow indicates resistance at higher levels, while a long lower shadow shows support at lower levels.

Among single candlestick patterns, a few are most common. The Doji has the opening and closing prices at the same point, looking like a plus sign, often appearing at trend tops or bottoms, signaling potential reversal. The Hammer has a long lower shadow with almost no upper shadow, typically appearing after a decline and signaling buying interest. The Shooting Star is the opposite of the Hammer, with a long upper shadow and a short lower shadow, often indicating a top after an upward move. There are also plain candlesticks with no shadows—just pure upward or downward movement—indicating a clear trend.

However, signals from a single candlestick are not very strong. More meaningful are patterns formed by two or more candlesticks. The Engulfing pattern is classic—one candlestick is “swallowed” by a larger candlestick of opposite direction, usually indicating a trend reversal. If an engulfing pattern appears near a support level after a long decline, it’s a particularly strong buy signal. The Piercing Line is similar: a red candlestick (downtrend) is followed by a green one that gaps down at open but closes above the midpoint of the previous candle, showing buyers gaining control.

Honestly, the biggest value of candlestick patterns is in helping you identify support and resistance levels, as well as whether the market is accumulating energy or about to reverse. But don’t treat candlestick charts as absolute prediction tools—they are just probabilistic. Context is crucial— the same pattern at a trend top versus in the middle of a trend means very different things. My personal habit is to wait for the next candlestick to confirm a signal, which greatly reduces the risk of false signals.

If you trade CFDs, candlestick patterns become even more useful because you can go long or short. A bullish pattern signals buying, a bearish pattern signals selling. Of course, the most important thing is to combine other indicators and higher-timeframe trends for judgment; relying solely on candlestick patterns can easily lead to getting caught. Recently, I’ve been observing candlestick patterns on some mainstream cryptocurrencies on Gate, and I’ve indeed found quite a few interesting trading opportunities.