Kagi Charts: Reversal-Based Trading

A Kagi line doesn't care when price moves — only that it moved enough to matter. When it does, the line changes thickness, signalling a shift in power between buyers and sellers.

Kagi is a Japanese charting method dating to the 1870s, originally used for rice prices. Where Renko prints bricks and P&F prints Xs and Os, Kagi draws a single line that thickens or thins based on the trend.

How Kagi lines work

A Kagi line moves vertically with price. When price reverses by a set reversal amount (often a percentage, like 4%), the line shifts one column right and reverses. If the new line breaks the prior high or low, the thickness changes:

• Yang line (thick): price broke above a prior high — bullish.
• Yin line (thin): price broke below a prior low — bearish.

Each yang/yin transition is a market-structure event, not a single candlestick.

Reading the line

• Yang-to-yin (thick to thin): trend turned bearish — exit longs, consider shorts.
• Yin-to-yang (thin to thick): trend turned bullish — exit shorts, consider longs.
• Shoulder — a mark where the line failed to make a new high before reversing. Resistance.
• Waist — a mark where the line failed to make a new low. Support.

A Kagi reversal strategy

1. Set the reversal amount to roughly 1 × ATR of your trading timeframe.
2. Wait for a yin-to-yang transition — the line thickens as it breaks a prior high.
3. Enter long on the close of the candle that completed the break.
4. Stop loss below the most recent waist.
5. Exit on the next yang-to-yin transition.

This skips the noise of every candlestick reversal and acts only on confirmed structural flips.

Advantages

• No time distortion: slow days show short lines; fast days show long lines.
• Clear transitions: the only signals are when the line changes weight.
• Self-adjusting: with ATR-based reversal, Kagi adapts to volatility.

Disadvantages

• Late signals: confirmation costs price.
• Ranging markets: sideways action produces many small yang/yin flips — whipsaw risk.
• Limited tooling: not all platforms support Kagi.

When Kagi works best

Kagi shines in trending, volatile instruments — index futures, commodities, large-cap stocks with extended runs. It is weakest in low-volatility ranges where reversals happen but never break structure.

For traders who struggle to hold winners, Kagi offers a visual rule: stay in the trade while the line is thick, exit when it thins. That simple discipline often beats complex systems.