Kagi charts — a price-based Japanese chart, not a time-based one

Most charts draw a new candle every minute, hour or day — whether or not anything is happening on the market. A Kagi chart works differently: it is one continuous vertical line that follows price and reverses only when the rate retraces by a set amount. What is more, that same line is sometimes thick and sometimes thin — and it is this change in thickness, not the movement itself, that gives the signal. For anyone lost in the noise of short candles, it can be a surprisingly clean picture of the trend.

What a Kagi chart is and where it came from

A Kagi chart is a Japanese technique based on price rather than time. Instead of candles you have one continuous line that extends upward as long as the rate rises and downward as long as it falls. When price merely twitches back and forth, the line lengthens in its current direction; it bends only when a move the other way exceeds a set reversal amount. That is the first and most important feature of the method: it ignores small swings by design. In the West the technique was popularised by Steve Nison in his 1994 book "Beyond Candlesticks", as a tool for isolating the trend, not for catching every move.

How the reversal amount and the line thickness work

„Kagi charts show the forces of supply and demand by a series of alternating thick and thin lines; the thickness of the lines changes based on how the market acts in relation to prior price levels." — Steve Nison, Beyond Candlesticks, John Wiley & Sons, 1994

The construction rests on two rules. The first is about direction: the line turns only when price retraces by a set reversal amount — a fixed number of pips, a percentage, or a value from the ATR. A smaller amount means more turns and a more sensitive chart; a larger one smooths the picture but delays the reaction. This dial most strongly changes the character of the method.

The second rule is about thickness, and it is the one that gives signals. The line turns thick (yang) when it breaks the previous peak, the shoulder, and thins (yin) when it drops below the previous trough, the waist. A turn on its own is not yet a signal — the signal is the yin↔yang switch, because that confirms the market has cleared a prior meaningful level. A buy appears when yin turns into yang; a sell, when yang thins to yin. The method waits for a real break instead of reacting to every twitch of the rate.

How to read and use this chart step by step

Step 1 — set the chart and the reversal amount

In TradingView or MetaTrader pick the "Kagi" chart type and start with a reversal amount based on the ATR, for example around one ATR value from the daily timeframe. If you have only ever used candles, it helps to refresh the broader technical analysis foundations first, because Kagi runs on a different logic than the time axis. You choose this amount once, deliberately, rather than changing it mid-trade.

Step 2 — read thickness, not just direction

Look at thickness first. A thick yang line says demand has the upper hand and the market is making fresh highs; a thin yin line says supply has taken control. The direction of a single segment is not enough — what matters is whether the line is thick or thin.

Step 3 — wait for a confirmed yin↔yang switch

Do not front-run the signal. A long entry makes sense only once yin turns into yang after breaking the shoulder, and a short entry only once yang thins to yin after dropping below the waist. The first switch right at an important level can be false, so wait for the move to complete.

Entry, stop and targets — an illustrative example

When the rate breaks the shoulder at 1.0950 and yin turns into yang, you have a confirmed buy signal and can consider a long position. The stop loss goes below the last waist — if price returned there, the premise of the signal would vanish. You set the target at the nearest resistance, or trail the position until the thick yang line thins back to yin. Remember the cost of the lag: the stop can be wide because it reaches all the way to the previous waist, and that has to be priced into your position size. These numbers are illustrative only, not a forecast.

Strengths and weaknesses you need to know

The biggest strength of Kagi is a clean picture of the trend combined with a clear read on the market's strength. The line filters out most of the noise, and its thickness tells you straight away whether demand or supply has the upper hand — the direction is visible almost at a glance, and the yin↔yang signal is unambiguous. It cools the emotions and discourages random entries.

The weaknesses are just as clear. First, the lag: the signal arrives only after the yin↔yang switch, so the start of the move usually slips by. Second, the absence of time and volume — the chart will not tell you how long a move lasted or what turnover accompanied it. Third, the sensitivity to the reversal amount, which badly chosen can flood you with signals or all but mute them. That is why it is sensible to keep Kagi next to a time-based chart: one shows the trend backdrop, the other gives entry precision.

How it compares with Renko, Three Line Break and Heikin-Ashi

Kagi belongs to a family of techniques that quiet the market's noise by different routes. It is closest to Renko charts, which also ignore time, except that they draw fixed-size bricks and you set the reversal threshold yourself in pips or via the ATR. Three Line Break charts have their threshold built into the structure: direction changes only after price breaks the extreme of the last three lines. The Heikin-Ashi technique is the gentlest relative, because it is still a time-based chart that merely averages the open and close. Kagi stands out because it adds thickness to the reversal amount, and that thickness itself encodes the strength of supply and demand and generates the signal — which makes it the most "talkative" of the four visually.

What to do tomorrow to get comfortable with Kagi

1. Open any major currency pair in TradingView on the daily timeframe, switch the chart type to "Kagi", and compare the same period with the candlestick chart to see how many small swings the line skipped before it even turned.
2. On that same chart find the historical spots where yin turned into yang or the other way round, and check whether the switch fell exactly on the break of the previous shoulder or waist — this trains your eye on genuine signals.
3. Deliberately test different reversal amounts: set a small value first, then one ATR value from the daily timeframe, and compare how many signals each one gives and how many were false near support and resistance.
4. Set up a simple journal with columns for the signal date, the direction of the yin↔yang switch, the level of the broken shoulder or waist, the stop loss, and the result, and fill it in after every demo trade.
5. Pair the Kagi chart with an ordinary time-based chart of the same pair: let the price version define the trend backdrop and its strength while the candlestick chart handles precise entry, and practise on a demo account first.