Candlestick Anatomy: OHLC, Body, Wicks

Every chart you'll ever look at is built from the same visual unit: the candlestick. Four prices — open, high, low, close — compressed into a rectangle with lines. Beginner guides often jump straight to named patterns ("hammer!", "engulfing!", "shooting star!") before explaining what the pattern is actually encoding. This article fixes that. Read this one first, then patterns make sense.

The short answer

A candlestick is a single bar representing price action during a specific time window. It shows four numbers:

Open — the price at the start of the period
High — the highest price reached during the period
Low — the lowest price reached during the period
Close — the price at the end of the period

These four numbers are called OHLC data. Every historical price record in trading — whether you see it as a candle, a bar, or a line — is OHLC underneath.

The anatomy

Every candlestick has two parts:

Body — the colored rectangle. Runs from open to close. Wicks (or "shadows") — the thin lines above and below the body. Run to high and low.

The color tells you direction:

Green (or white): close is higher than open — the period ended up from where it began.
Red (or black): close is lower than open — the period ended down.

On a 1-hour candle that opened at 1.0850, reached 1.0870, dropped to 1.0845, and closed at 1.0855:

Body: from 1.0850 (open) to 1.0855 (close) — green because close > open.
Upper wick: from 1.0855 (top of body) to 1.0870 (high).
Lower wick: from 1.0845 (low) to 1.0850 (bottom of body).

What the body size tells you

The body size measures how decisively the period closed vs where it opened.

Long body = strong directional move. Close far from open. Whoever dominated (buyers or sellers) controlled the period.
Short body = indecision. Close near open. Neither side won the timeframe.
No body (doji) = open equals close exactly. Complete indecision. The period ended exactly where it started despite movement in both directions.

A long green body on 4H EUR/USD tells you that over those four hours, buyers pushed price decisively higher and held it into the close. A short green body on the same timeframe tells you buyers barely won; a red candle the next period wouldn't be a surprise.

What the wicks tell you

The wicks tell you where price tried to go but didn't close.

Long upper wick = price rallied during the period but was rejected. Sellers came in.
Long lower wick = price dropped but was rejected. Buyers came in.
Long wicks both sides = volatility without direction. Price was pushed both ways and came back to center.

A candle with a long lower wick and a small green body — sometimes called a "hammer" — tells you price tested lower prices during the period, buyers absorbed the selling, and price closed back near the high. That's a more meaningful signal than a pure directional body, because the wick proves that selling was tried and failed.

Why candles are useful vs bars vs lines

Three standard chart types encode the same data with different visual weight:

Line charts show only the close. Clean but loses 3/4 of the information.
OHLC bars show all four prices as a vertical line with two ticks (open left, close right). Compact, precise, common in traditional finance.
Candlesticks show all four with the body+wick structure. Easier to read direction at a glance because of the color coding.

Candlesticks became the retail default for a reason: your eye can parse 100 candles on a chart in a few seconds because color and shape encode direction and momentum simultaneously. The same 100 periods as OHLC bars takes noticeably longer to read.

Timeframe matters more than candle shape

A common beginner trap is treating every candle as equally important. It isn't.

A bullish engulfing candle on the 1-minute chart is a 60-second event. It might mean a 10-second order flow shift from an institutional trader, or it might be random noise from one retail stop-loss triggering. Either way, the information fades within minutes.

The same pattern on the daily chart is a 24-hour event, driven by fundamentally more capital making a decision. It carries more weight. Not proportionally more — markets are noisy at all timeframes — but meaningfully more.

A rough hierarchy of meaningfulness, for the same pattern:

M1–M5: noise. High-frequency signals drown out pattern meaning.
M15–H1: short-term tactical signals. Useful for entry timing.
H4–D1: structural signals. Useful for trend and bias decisions.
W1–MN: strategic signals. Define the "macro regime" for weeks or months.

Most profitable setups combine two timeframes — e.g., a weekly trend bias filtered by a daily or 4-hour entry pattern. Trading a D1 engulfing candle ignoring the weekly trend is much weaker than trading the same pattern in the weekly direction.

The closing price is the one that matters

While a candle is forming, price moves around freely. Traders new to charts often panic-read a candle's current appearance as if it were final: "It's a huge bearish candle!" — when there are still four hours of the 4H period left.

Only the close is the signal. The moment the period ends, the candle's shape is permanent and can be evaluated. Before that, everything is provisional.

This has a practical consequence: strategies that trigger on closed-bar-only (Aurion does exactly this for all three strategies) are more robust than those that act on intrabar conditions. Intrabar conditions can reverse — a closed bar cannot.

Reading a sequence, not a single candle

Individual candles rarely tell you anything actionable. The information is in sequences:

Four consecutive green candles with small wicks and increasing body size → strong uptrend in progress.
A large green candle followed by a candle with a long upper wick and a small body → rally attempted, got rejected, momentum stalling.
A sequence of small bodies and long wicks on both sides → choppy, indecisive market. A breakout from this range — whichever direction — usually carries.

Pattern recognition systems (human or algorithmic) work on these sequences, not single candles. Beginner pattern guides that focus on "this one candle means X" miss the point: the surrounding context is what makes the pattern valid or invalid.

The time coordinate you almost always ignore

One more thing beginners miss: candlesticks on MT5 use broker server time on the x-axis, not UTC or your local time. A "4-hour candle" that opens at midnight broker time might be 17:00 UTC or 01:00 UTC depending on the broker's server offset.

If you trade based on session opens — "the London 8:00 candle", "the NY open candle" — you need to know your broker's time offset. For IC Markets that's GMT+2/+3 depending on DST; for Ava Trade it's GMT+0. The same literal candle at the same literal position on two brokers' charts can represent two different real-world hours. This is why Aurion has a dedicated time-context module — accurate trading depends on converting broker time to UTC cleanly.

What to do with this

Three concrete takeaways:

Read body + wicks together, not separately. A long green body with no upper wick is a completely different signal than a long green body with a long upper wick. Always evaluate both.
Pick a primary timeframe and stick to it. Flipping between M5 and H1 candles constantly teaches your eye to react to noise. Most successful traders develop a primary timeframe (H1 or H4 is common) and a secondary for context (D1).
Never act on an open candle. Wait for the close. If you find yourself checking the chart multiple times within a single candle's formation, your timeframe is too short for your attention span — move up a timeframe.

Candlesticks are dense. Each one encodes four numbers and a direction. Once you internalize the body-and-wick language, recognizing named patterns becomes pattern-matching on a vocabulary you already understand.

What Is a Pip and a Point in Trading? — the unit the body and wicks are measured in
What Is Spread in Forex? — why the close you see is not the price you get
What Is a Stop Loss in Trading? — placing the exit relative to a candle's high or low