A Kagi diagram (also known as a Kagi chart) is a type of financial chart used primarily in technical analysis to track price movements of securities (stocks, commodities, forex, etc.). It originated in Japan in the 1870s and was later popularized by Steve Nison in the West.
Key Features of a Kagi Diagram:
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Price-Driven (Not Time-Based): Unlike candlestick or bar charts, Kagi charts do not have a fixed time axis. Instead, they change direction based on price movement.
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Thick and Thin Lines:
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A thick line (Yang line) indicates rising prices (demand > supply).
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A thin line (Yin line) indicates falling prices (supply > demand).
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Reversal Criteria: The chart reverses direction when price moves by a predefined reversal amount (e.g., 3%, 5%, or a fixed value).
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No Wicks or Shadows: Unlike candlestick charts, Kagi lines are simple and do not show intra-period volatility.
How a Kagi Diagram Works:
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If the price continues in the same direction, the Kagi line extends.
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If the price reverses by the specified threshold, a new Kagi line is drawn in the opposite direction.
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A change from thin to thick signals a buying opportunity (uptrend confirmation).
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A change from thick to thin signals a selling opportunity (downtrend confirmation).
Advantages of Kagi Charts:
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Filters out noise by focusing on significant price movements.
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Helps identify trend reversals and support/resistance levels.
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Useful for spotting breakouts and trend strength.
Example Use Case:
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If a stock price rises above a previous high by the reversal amount, the Kagi line turns thick, suggesting a bullish trend.
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If it falls below a previous low, the line turns thin, indicating bearish momentum.
Comparison with Other Charts:
| Feature | Kagi Chart | Candlestick Chart | Line Chart |
|---|---|---|---|
| Time-based? | No | Yes | Yes |
| Shows trend reversals? | Yes | Partial | No |
| Visual thickness changes? | Yes | No (uses candles) | No |
Kagi charts are particularly useful for traders who want to eliminate minor price fluctuations and focus on meaningful trends. They work well in trending markets but may give false signals in sideways (range-bound) markets.
