Why candlesticks won
Candlestick charts originated with Japanese rice traders centuries ago and have become the default way modern traders read price, for one good reason: a single candle packs four pieces of information into a shape you can interpret instantly. Compared with a plain line chart, which shows only the closing price, a candlestick chart reveals the whole story of a period — where price opened, how far it travelled in each direction, and where it settled.
Each candle represents one unit of time, and you choose that unit with the timeframe. On a 1-hour chart every candle is one hour; on a daily chart every candle is one day. The same instrument can look calm on a daily chart and frantic on a 5-minute chart, which is why traders match their timeframe to their style.
Anatomy of a single candle
Every candle has a body and, usually, two wicks (also called shadows). The body spans the distance between the open and the close. The wicks extend to the highest and lowest prices reached during the period. By convention a candle that closes above its open is drawn in a bullish colour, and one that closes below its open in a bearish colour.
The shape tells you who won the period. A long body with short wicks means one side dominated from open to close. A small body with long wicks means price travelled far in both directions but finished near where it started — a sign of indecision and a potential turning point.
Key points
- Open: the first traded price of the period.
- Close: the last traded price — the most important of the four.
- High and low: the extremes, shown by the wick tips.
- Body: open-to-close; wick: the rejected territory beyond the body.
Patterns worth knowing
A handful of single- and double-candle patterns recur often enough to be useful. A doji has almost no body — open and close are nearly equal — and signals a stand-off between buyers and sellers. A hammer has a small body and a long lower wick, showing that sellers pushed price down but buyers reclaimed control, often near the end of a downtrend. A shooting star is its mirror image at the top of a rally.
The engulfing pattern is a two-candle signal where the second candle's body completely engulfs the first in the opposite direction — a bullish engulfing after a decline, or a bearish engulfing after an advance, hints at a shift in momentum.
Context is everything
A pattern in isolation means very little. A hammer in the middle of a quiet range is noise; the same hammer right at a tested support level, after an extended fall, is a far stronger signal. The reliable way to use candlesticks is as confirmation of a level or trend you have already identified, not as a standalone trigger. Always wait for the candle to close before acting — an in-progress candle can change shape completely before the period ends.
Key takeaways
Candlesticks compress the open, high, low and close into a shape you can read at a glance, exposing the tug-of-war between buyers and sellers that a line chart hides. Learn the doji, hammer, shooting star and engulfing patterns, but treat them as clues rather than commands — their value comes from where they appear. Combine candle signals with support, resistance and trend, and always trade the close, not the candle still forming.
Knowledge check
Test what you've learned
1.What does the body of a candlestick represent?
2.What does a candle with a small body and long wicks on both sides usually signal?