What are Japanese candlesticks?

Japanese candlesticks are the standard way to chart prices in trading: each candle summarizes the open, close, high, and low of a period. Its shape tells you, at a glance, who won the tug-of-war between buyers and sellers.

Japanese candlesticks, from Osaka rice to your screen

The method is over two centuries old. Munehisa Homma, an 18th-century Japanese trader who operated in the Osaka rice market, systematized the idea that price reflects not just the harvest but the emotions of those trading it, and developed the chart representation we know today. The West only discovered it in the 1990s, when analyst Steve Nison popularized it. It survived intact through paper charts, electronic trading, and algorithmic trading: few tools age this well.

Anatomy of a Japanese candlestick

Every candle has a body and wicks. The body runs from the period’s opening price to its closing price: green (or white) if it closed above where it opened, red (or black) if it closed below. The wicks are the thin lines that stick out: they mark the high and low the price touched before pulling back. A 1-day candle sums up 24 hours of battle; a 5-minute candle, a skirmish.

Reading them is intuitive. A large green body means buyers dominated with authority; a large red body means sellers dominated; a long lower wick means sellers pushed the price down but buyers took the ground back (rejection of the low); a tiny body with wicks on both sides means a technical tie and indecision. That four-letter alphabet is what spells out every pattern.

The candlestick patterns everyone watches

The hammer: a small body near the top, a long lower wick, after a prolonged decline. It tells you sellers lost control by the end of the period; a possible bottom. Its inverted twin at the top is the shooting star. The bullish engulfing pattern: a green candle whose body completely “swallows” the previous red candle’s body; an aggressive change of command. The doji: an open and close that are nearly identical, pure indecision, relevant when it appears after an extended trend.

Two warnings courses tend to skip. First, no pattern works in a vacuum; a hammer at a major support level with rising volume says something, a hammer floating in the middle of nowhere says almost nothing. Second, patterns are modest probabilities, not prophecies. In a market as manipulable as small-cap altcoins, treating them as certainties just funds someone else’s account.

A hammer in action

After a week of declines, Bitcoin draws a candle on the daily chart with an extremely long lower wick: during the day it fell as much as 8%, but closed almost where it opened. The takeaway is that someone bought all of that dip. Traders who follow candlesticks don’t buy that day; they wait for confirmation from the next candle (does it close above the hammer’s body?) and only act then, with the stop below the wick. The pattern wasn’t the signal; it was the invitation to watch closely.

Candlestick timeframes: zoom matters

The same screen can show 1-minute or 1-week candles, and the story changes with the zoom level: a downtrend on 15-minute candles can be a sideways pause within a weekly uptrend. As a general rule, larger timeframes (daily, weekly) produce slower but more reliable signals; smaller ones produce more signals and more noise. Traders tend to decide direction on the larger timeframe and fine-tune the entry on a smaller one.

Candlesticks and volume: the witness that confirms or denies

There are almost always volume bars below the candles, and reading them together doubles the information: a huge green candle with high volume is conviction; the same candle with anemic volume is a move without backing that can unwind tomorrow. Reliable reversals tend to come signed with volume (the hammer that marks a real bottom brings visible mass buying), and level breaks without volume are the classic candidates for a false breakout. The candle tells you what happened to the price; the volume tells you how many people backed it.