Candlestick Basics (OHLC)

Japanese candlesticks are a foundational tool in financial technical analysis, translating raw market data into a visual narrative of price action. By capturing the interaction between buyers (bulls) and sellers (bears) within a specific timeframe, a single candlestick provides detailed context regarding price movement alongside traditional line charts, which also remain useful for closing-price trend analysis.

Every candlestick is built upon four exact data points, collectively known as OHLC. Whether a chart is set to a one-minute interval for day trading or a monthly interval for long-term investing—though it is critical to note that short-term speculation carries severe capital depletion risks—these four metrics dictate the candle's shape.

The OHLC Data Points

Open (O): The very first price at which an asset trades when the selected time period begins. It establishes the baseline for the session.
High (H): The absolute highest price the asset reached at any point during that specific time period. It represents the upper limit of buying activity before selling pressure entered the market.
Low (L): The absolute lowest price traded during the period. It identifies the point where downward pressure halted during the session.
Close (C): The final price traded before the time period ended. Analysts view the Close as a critical metric because it reflects the market's concluding consensus value for that specific timeframe.

Anatomy of the Candlestick

These four data points combine to form a distinct visual structure divided into two primary components: the real body and the wicks.

The Real Body The wide, solid section of the candlestick represents the absolute spread between the Open and the Close.

Bullish Candle (Green or White): If the Close is higher than the Open, the asset gained value. The Open is at the bottom of the real body, and the Close is at the top.
Bearish Candle (Red or Black): If the Close is lower than the Open, the asset lost value. The Open sits at the top of the real body, and the Close is at the bottom.

Wicks (Shadows) The thin lines extending above and below the real body are known as wicks or shadows. The upper wick reaches the High of the period, while the lower wick drops to the Low. Wicks illustrate intra-period volatility and historical execution ranges—the price extremes that occurred during the session but were not sustained by the Close.

Market Dynamics and Pattern Interpretation The proportions of the body and the wicks provide theoretical interpretations of market momentum, though they carry no performance guarantees.

A long real body with very short wicks indicates concentrated momentum, showing that one side of the market maintained stronger relative pressure. A long green body shows aggressive buying pressure. Conversely, a long red body signals strong selling pressure, which can stem from brief liquidity voids rather than systematic capitulation.

Wicks reflect historical price rejection. A candlestick with a small real body and a long lower wick (often called a hammer) shows that while sellers initially pushed prices downward, subsequent buying interest recovered the asset toward the upper range. Isolated single-candle patterns require contextual market confirmation and carry no predictability guarantees.

When the Open and Close settle at virtually identical price levels, the candlestick forms a cross-like shape called a Doji. This reflects low transactional turnover or equilibrium between buyers and sellers, rather than active psychological indecision.

Technical analysis and historical chart patterns do not guarantee future market behavior. Trading carries substantial risk of capital depletion. Where analytical tools are applied to multinational instruments or foreign assets, exchange rate fluctuations can adversely affect asset value, realized price, or investment income.

Master the basics, always look for contextual confirmation, and protect your capital.