Introduction

Candlestick patterns are the visual language of price action. Each candle compresses four data points — open, high, low, and close (OHLC) — into a single shape, letting you gauge who is winning the battle between buyers and sellers in a glance. In crypto markets, where price can swing violently in minutes, reading these patterns correctly gives you a measurable edge over traders who only watch raw price numbers.

This lesson walks through how to read single-candle structures (like doji and marubozu), multi-candle formations (like engulfing and morning star), and how to place them inside the broader context of support, resistance, and trend structure.

Anatomy of a Single Candle

Every candle has a body (the rectangle between open and close) and wicks or shadows (the thin lines extending above and below). The color tells you direction: green/white means close is above open (bullish), red/black means close is below open (bearish).

A long body with short wicks shows strong momentum — one side dominated the entire period. A small body with long wicks (a spinning top) shows indecision — both sides fought hard but neither won clearly. A candle with virtually no body is called a doji, and it signals that open and close were nearly equal, meaning the market is pausing or about to reverse.

// Example: classifying a single candle from OHLC data
function classifyCandle({ open, high, low, close }) {
  const body = Math.abs(close - open);
  const range = high - low;
  const upperWick = high - Math.max(open, close);
  const lowerWick = Math.min(open, close) - low;

  if (body / range < 0.1) return 'doji';
  if (body / range > 0.8 && upperWick < body * 0.2 && lowerWick < body * 0.2) {
    return close > open ? 'bullish_marubozu' : 'bearish_marubozu';
  }
  if (upperWick > body * 2 && lowerWick > body * 2) return 'spinning_top';
  return 'normal';
}

The marubozu is particularly important in crypto because it often appears right before a strong continuation move. When you see a full-bodied bullish marubozu after a period of consolidation on a 4-hour chart, the probability of a follow-through rally in the next 6–12 candles is noticeably higher.

Reading Multi-Candle Patterns

Multi-candle patterns combine 2 or 3 candles to tell a story. The two most reliable in crypto trading are the engulfing pattern and the morning/evening star.

A bullish engulfing pattern forms when a small red candle is followed by a larger green candle whose body completely covers the previous body. It means sellers pushed down first, then buyers overwhelmed them. The opposite — a bearish engulfing — is a reversal warning at the top of a rally.

// Example: detecting bullish and bearish engulfing from two candles
function detectEngulfing(prev, curr) {
  const prevBody = Math.abs(prev.close - prev.open);
  const currBody = Math.abs(curr.close - curr.open);

  const isBullish =
    prev.close < prev.open && // previous was red
    curr.close > curr.open && // current is green
    curr.open <= prev.close && // current opens at or below prev close
    curr.close >= prev.open;   // current closes at or above prev open

  const isBearish =
    prev.close > prev.open &&
    curr.close < curr.open &&
    curr.open >= prev.close &&
    curr.close <= prev.open;

  if (isBullish && currBody > prevBody) return 'bullish_engulfing';
  if (isBearish && currBody > prevBody) return 'bearish_engulfing';
  return null;
}

The morning star is a 3-candle reversal pattern: a long red candle, a small indecision candle (often a doji), then a long green candle. It is most trustworthy when it appears at a known support level, not floating randomly in the middle of a chart.

Placing Patterns in Chart Structure

A candlestick pattern by itself is just a shape. Its meaning depends on where it appears. A bullish engulfing at the bottom of a downtrend near a horizontal support zone is a high-probability long signal. The same pattern in the middle of a range with no support nearby is noise.

Always check three things before acting on a pattern: the prevailing trend direction, the nearest support or resistance level, and the volume. A reversal candle on heavy volume carries more weight than the same candle on thin volume. In crypto, you can read volume directly from the exchange chart — if the reversal candle's volume is 1.5x or more the 20-candle average, treat it as confirmation.

Common Mistakes

The most common error is trading every pattern as if it were a signal. Most doji and small-body candles are just pauses, not reversals. Another error is ignoring the timeframe — a bullish engulfing on a 5-minute chart in a strong downtrend on the daily chart is low conviction. Always confirm the pattern aligns with the higher timeframe direction.

Finally, never rely on a single pattern in isolation. Use it together with structure (support/resistance), momentum (RSI or MACD if you use them), and risk management (your stop-loss placement). A pattern is a trigger, not a complete trade thesis.

Summary

Candlestick reading is about compressing time into shape: body length shows strength, wick length shows rejection, and color shows direction. Single candles classify momentum, multi-candle patterns flag potential reversals, and chart structure tells you whether those flags matter. In the next lesson, you will apply these patterns alongside volume analysis and risk management rules to build complete trade setups.