The candlestick
A trading chart looks like a forest of little colored bars, and most beginners see noise. But each one of those bars is a tidy package holding four separate facts about a slice of time — and once you can unwrap it, the whole forest starts talking.
The candlestick is the alphabet of everything that follows. Get comfortable with this one shape and every chart, pattern, and indicator in the rest of the course becomes readable. So let's learn to read a single candle at a glance.
Each candle covers one chunk of time — say, one day — and records exactly four prices from that period: the open (the first trade), the high (the most anyone paid), the low (the least), and the close (the last trade). People call this the OHLC for short. That's the entire information content of a candle: those four numbers.
The shape shows them at a glance. The thick middle part is the body, and it spans the distance between the open and the close. The thin lines poking out the top and bottom are the wicks (also called shadows), and they reach up to the high and down to the low — how far price stretched before coming back.
Color tells you who won the period. If price closed higher than it opened, the candle is green (bullish) — buyers were in control. If it closed lower than it opened, it's red (bearish) — sellers were. So a candle isn't just data; it's a tiny story of a tug-of-war, with the winner written in its color.
Here are the two kinds side by side. Same four prices in play — the only difference is whether the open or the close ends up on top:
one candle · open · high · low · close
Notice what the wicks tell you. A long lower wick means sellers shoved price way down during the period, but buyers fought it all the way back up before the close — a quiet sign of buying strength. A long upper wick is the reverse: buyers pushed up but got rejected. The body and wicks together sketch not just where price ended, but the struggle it took to get there. That struggle is the whole reason candles beat a plain line chart.
A candle tells you what happened, never why and never what comes next. Green does not mean "going up from here," and a big body does not guarantee follow-through. It's a record, not a prediction — reading it as a forecast is the first mistake beginners make with candles.
And one candle in isolation is nearly meaningless. A hammer-shaped candle at an important level can be a real signal; the identical candle in the middle of nowhere is noise. Candles only start to mean something in context — where they appear, what came before, and on which timeframe. That last part matters so much it's the very next lesson.
So treat the candle as vocabulary, not sentences. Right now the goal is just fluency: glance at any bar and instantly see its four prices and who won. The meaning — patterns, trends, signals — gets built on top of this in the lessons ahead. You can't read the story until you know the letters, and the candle is the letters.
Open the Lab, pause on any single candle, and read it out loud: "opened here, closed here, high there, low there — green, so buyers won." Do that for five candles in a row until the four prices jump out without effort.
Then press Play and watch one candle build in real time. See how its body stretches and its wicks grow as price moves, and how it only locks in its final color at the close. Watching a candle form is the fastest way to stop seeing bars and start seeing the battle inside each one.
Open the Lab →- Each candle packs four prices for one time period: open, high, low, close (OHLC). The body is the open-to-close range; the wicks reach to the high and low.
- Green means it closed above its open (buyers won); red means it closed below (sellers won). Long wicks reveal a struggle — a push that got rejected.
- A candle records what happened, not what's next, and one candle alone means little. It's vocabulary — meaning comes from context and timeframe.