How to read a candlestick chart from scratch

A candlestick is four numbers and a colour. The four numbers are the open price, high price, low price, and close price for some fixed window of time — a minute, an hour, a day. The colour is whether the close came in above the open (green) or below it (red). Everything else about the chart — the wicks, the body lengths, the shapes traders give names to — is just a visual encoding of those four prices. Once you can name each part, the chart stops being a wall of red and green sticks and starts being a row of small reports about who won which fight.

This post is the from-scratch version. You don't need to know any pattern names or have any opinion about charts. You only need to be able to point at one candle and tell what each piece of it represents — and from that, what the bar is actually telling you about the period it covers.

The anatomy of one candle

Reading the diagram from the bottom up: the low is the lowest price the asset traded at during the period. The open is whatever price kicked off the period. The close is the last trade in the period — and on a green candle it sits above the open, telling you the period finished higher than it started. The high is the highest tick during the period.

The body is the rectangle between the open and close. It tells you the bar's net direction. A long body is a clear winner. A tiny body is a tie. The colour fills in the verb: green for "close above open" (buyers won), red for "close below open" (sellers won).

The wicks — also called shadows — are the thin vertical lines extending from the body to the high and low. They tell you about prices that were touched but rejected. The upper wick reaches the high; the lower wick reaches the low. A long upper wick on a green candle means buyers pushed price even higher than the close, but couldn't hold it. A long lower wick on the same candle means sellers tried to push price below the open, failed, and got run over.

That's the whole alphabet. Five visible elements (body, two wicks, plus the two horizontal endpoints), four price points, one direction. Every pattern name in the candlestick literature is a label for some specific arrangement of those parts.

Bullish vs bearish — the colour rule

A candle is bullish when the close is above the open. Most charting platforms paint bullish candles green or white. A candle is bearish when the close is below the open — painted red or black. The colour is purely a function of close-vs-open; the wicks don't enter the calculation.

That detail trips up newer chart-readers. A bullish (green) candle can have a low far below the open, because the asset traded down before recovering and closing higher. The candle is still green. Conversely, a bearish (red) candle can have a high far above the open if buyers ran the price up first before getting reversed. The colour is the period's net result, not the path it took to get there.

When the open and close are essentially equal — within a tiny fraction of the bar's range — the body collapses to a horizontal line. That's a doji, and it gets its own name precisely because the directional signal disappears: neither side won.

Body vs wick — what each one means

The body and the wicks are saying different things about the period.

The body is the consensus interval. It marks the price range that survived the bar — buyers were willing to buy there, sellers were willing to sell there, and the period wrapped up inside that range. A long body means the period had a strong directional commitment, end to end. The market moved decisively from open to close and didn't change its mind much along the way.

The wicks are the rejection zones. Price visited those levels but couldn't stay. A long upper wick says price went up, sellers found it expensive enough to push back, and buyers couldn't defend the level. A long lower wick is the mirror — price went down, buyers found it cheap enough to step in, and sellers couldn't keep it there. Wicks measure how far the bar tried to go in directions that didn't hold.

The single most useful thing about candlesticks vs. line charts is this — the wick-vs-body ratio tells you how decisive the period was. A line chart shows you only the close. A bar chart of the same data shows you only the close-to-close move. A candlestick shows you the close and tells you whether that close came easily or after a fight, and which direction the failed attempts went. That's a richer signal for the same data.

The four base shapes (before any pattern names)

Most candlestick books open by introducing fifty pattern names — engulfing, hammer, shooting star, three white soldiers, evening star. Skip those for now. The base patterns the literature builds on are four shapes, and you should be able to recognise each one by sight before any name attaches to it.

A long bullish body with small wicks says the period opened, traded mostly upward, and closed near the high. Buyers controlled the bar from start to finish. The wicks barely registered because price didn't bother to test much in either failed direction. This is what conviction looks like in a single candle.

A long bearish body is the same shape upside-down — opened, traded mostly down, closed near the low. Sellers ran the period uncontested. On a daily chart, a string of these is the visual signature of a strong downtrend.

A doji is the indecision candle. Open and close land at essentially the same price; the body collapses to a hairline. Whatever happened during the period netted to zero. The wicks tell you whether the bar tried to move (long-legged doji = both wicks long) or stayed still (standard doji = small wicks). At the end of a strong trend, dojis often mark the moment momentum runs out. Mid-range, in low-volume periods, they're noise. The doji classifier tool covers the four subtypes (standard, long-legged, dragonfly, gravestone) and the math for telling them apart.

A marubozu ("bald" in Japanese — no wicks) is the strongest version of a directional candle. Open at the high (or low), close at the low (or high), no rejection at either end. It says the entire bar's range was the body — every price the asset visited got incorporated into the consensus, no testing, no rejection, no chop. Marubozu candles are rare and read as a market stating its mind in the strongest available way.

Reading a live candle in practice

Here's the current 1-hour BTC candle on Phemex spot, computed from the platform's own minute-by-minute price samples. Each part is labelled the same way as the diagram above, with the actual numbers.

Whatever's drawn here is the result of the last 60 minutes of trading, recorded as it happened. The body and wicks aren't an interpretation — they're a rendering of the close-vs-open spread and the high-vs-low rejection levels. If the body is large, the period had directional commitment. If the wicks dwarf the body, price moved in both directions and didn't settle. If you reload this page in five minutes, the candle will have shifted as new samples come in.

Practising on live data beats memorising patterns. Pull up the same chart on any platform that has minute-data feeds, look at one candle at a time, and try to verbalise what each part is telling you before you reach for any pattern name. "Body's three-quarters of the range. Long lower wick, short upper. So the bar opened, dropped, recovered to close near the high — buyers rejected the lower zone." After a few hundred candles that's automatic.

What candlesticks aren't doing

A candle isn't a prediction. It's a record. A long green candle doesn't mean the next candle will also be green — it means this candle had buyers in control. A doji at the top of an uptrend doesn't cause a reversal; it documents a moment where the trend's momentum stopped, and the reversal (if it happens) shows up in the next bar. The pattern is information about a period that already finished, not a forecast about the next one.

A single candle also can't carry trend-context information by itself. The same shape means different things at different locations on the chart. A bullish marubozu in the middle of a strong uptrend is the trend continuing; the same candle at a major resistance level after a long rally is the trend's last gasp before getting reversed. Context — trend, location, volume, prior structure — is what turns a candle into a tradeable observation. The candle alone is the bar's report. Whether the bar matters is everything else.

The classical candlestick literature was developed by Japanese rice traders in the 18th century, formalised in the West largely through Steve Nison's Japanese Candlestick Charting Techniques in 1991. Their value held up for two reasons: the encoding is genuinely efficient (every pixel of a candle is doing work), and the patterns are easy to apply by eye. Their limitations have also held up: every reliable trading framework that uses candles uses them as one input alongside trend, structure, and volume, never as a standalone signal.

For the related pattern-detection tools that show specific multi-candle setups, the engulfing pattern checker covers the two-bar bullish/bearish-engulfing test, and the doji classifier covers the four single-candle indecision shapes. Both run the same OHLC math the rest of this post is built on.

FAQ

Related reading

• Where BTC sat for the longest today — the levels worth pre-marking so a candle pattern at one of them actually means something.
• The London session runs crypto, not New York — the timeframe context that determines which candles carry the most weight.
• Confirmation bias on charts and how to disagree with yourself — the cognitive trap where pattern recognition overrides probability.
• Today's BTC in one number — the simplest possible chart-reading: skip candles entirely and read BTC as a single percentage move.

Tools that go with this

• Doji candle detector and classifier — input one OHLC, get back doji yes/no plus the subtype with the wick-ratio thresholds.
• Engulfing pattern checker — the two-candle structural test. Same OHLC math, different pattern.