This one bar contains four pieces of information. Can you guess what they are?
Take a moment. Look at the shape — the thick body, the thin lines extending above and below. What story could those parts be telling about what happened during a single trading session?
What a candlestick represents
Every candlestick captures four prices from a given time period:
- Open — where the price started
- Close — where the price ended
- High — the highest price reached
- Low — the lowest price reached
That's it. Four numbers. But their arrangement reveals something a simple line chart never could: the battle between buyers and sellers within that period.
Green vs red
The color tells you who won.
- Green (or white): The close is higher than the open. Buyers pushed the price up by the end of the session.
- Red (or black): The close is lower than the open. Sellers drove the price down.
This isn't just data — it's the outcome of a psychological contest. Every green candle represents a period where optimism prevailed. Every red candle, a period where fear or profit-taking won out.
Body vs wick
Now look more carefully at the anatomy:
- The body (the thick part) shows the distance between open and close. A long body means one side dominated decisively.
- The wicks (the thin lines, also called shadows) show how far price traveled beyond the open-close range before being pushed back.
Here's the key insight: a long wick means rejection.
If a candle has a long upper wick, price tried to go higher but was rejected — sellers stepped in and forced it back down. A long lower wick means price dropped but buyers rejected that lower level and pushed it back up.
Think about what that means psychologically. A long wick is a failed attempt. It's the market saying "we tried that price level and said no."
Common patterns worth recognizing
Once you understand the body-and-wick logic, certain shapes start to pop out:
Doji — The open and close are nearly identical, creating a tiny body with wicks on both sides. Neither buyers nor sellers won. Indecision. Often appears at turning points because the prevailing trend ran out of conviction.
Hammer — A small body at the top with a long lower wick. Price fell hard during the session, then buyers stormed back and closed near the high. After a downtrend, this signals potential reversal: "sellers tried their hardest and failed."
Shooting star — The mirror image of a hammer. A small body at the bottom with a long upper wick. Buyers pushed price up aggressively, but sellers overwhelmed them by the close. After an uptrend, this is a warning sign.
Notice the pattern: every candlestick shape is really a story about who tried what and who won. You're reading the psychology of the market, compressed into a single bar.
Why candlesticks beat line charts
A line chart connects closing prices. That's all. You see where the price ended each day, but you have no idea what happened during the day.
Did price open low and rally all day? Did it spike up, get rejected, and barely close positive? A line chart hides all of this. A candlestick chart shows you the entire intraday story — who attacked, who defended, and who walked away in control.
Once you learn to read candles, a line chart feels like reading a book with every other sentence removed.
Try it yourself
Here's your exercise:
- Open TradingView (free account works).
- Search for any stock — pick one you've heard of.
- Switch the chart to candlestick view (it's the default, but if you see a line chart, click the chart type selector and choose "Candles").
- Zoom into a daily chart. Find one candle with a very long wick — upper or lower.
- Ask yourself: what happened there? Who tried to push price in a direction and failed?
You'll start seeing these rejection signals everywhere once you know what to look for.
PaperEdge tracks candlestick patterns across 100+ tickers automatically — join free to follow along as we build on these skills.
Next: Understanding Price Movement →