Keltner Channels and Donchian Channels: formulas, settings and how to read them
What are Keltner Channels and Donchian Channels?
Keltner Channels and Donchian Channels are two volatility envelopes drawn around price. Both create an upper and lower boundary, but they build those boundaries in very different ways, and that difference changes how you read them.
Keltner Channels put bands a fixed multiple of ATR above and below an exponential moving average. They are smooth and track the trend. Donchian Channels simply mark the highest high and lowest low of the last N candles. They are stepped and show exactly where recent range extremes are. Both are close relatives of Bollinger Bands.
Donchian upper = highest high of N · Donchian lower = lowest low of N · Middle = (upper + lower) ÷ 2 (common N = 20)
How Keltner Channels are calculated
Chester Keltner described the original version in 1960 using a simple average of typical price and the average daily range. The modern version, popularised by Linda Raschke, uses:
- Middle line: 20-period EMA of close.
- Upper band: EMA + 2 × ATR(10).
- Lower band: EMA − 2 × ATR(10).
Illustration
On a 5-minute NIFTY chart the 20 EMA is 24,180 and ATR(10) is 15 points. The bands are at 24,150 and 24,210. If ATR rises to 25 after a volatile candle, the bands widen to 24,130 and 24,230.
Because ATR changes slowly, Keltner bands move smoothly, unlike Bollinger Bands, which use standard deviation and can balloon after one big candle.
How Donchian Channels are calculated
Richard Donchian, a pioneer of trend following, used the simplest possible channel: the highest high and lowest low of the past N periods. The middle line is the average of the two.
Illustration
Over the last 20 five-minute candles, BANKNIFTY's high is 51,900 and low is 51,650. The Donchian upper band is 51,900, lower 51,650, middle 51,775. The upper band stays flat until a candle trades above 51,900 or the old high drops out of the 20-candle window.
The famous Turtle Traders of the 1980s used 20- and 55-day Donchian breakouts as the core of their trend system.
How to read the channels
Keltner Channels
- Price riding the upper band with the EMA rising: strong up-trend.
- Price moving back to the EMA: normal pullback.
- Closes outside the band: unusually strong momentum relative to recent ATR.
- Flat EMA with price bouncing between bands: range.
Donchian Channels
- A new high touching the upper band: price is at a fresh N-period extreme.
- Upper band rising step by step: a trend making repeated new highs.
- Both bands flat and close together: compression, often before a breakout.
Best settings for NIFTY 5-minute
| Indicator | Setting | Notes |
|---|---|---|
| Keltner | EMA 20, ATR 10, ×2 | Standard; good default on 5- and 15-minute |
| Keltner | EMA 20, ATR 10, ×1.5 | Tighter; used in the squeeze comparison |
| Donchian | 20 | About 100 minutes on 5-minute; good intraday breakout reference |
| Donchian | 55 | Slower; most of a session on 5-minute |
On a 5-minute chart NIFTY has 75 candles per session (9:15 to 15:30 IST), so a 20-period Donchian covers roughly the last quarter of the day. Choose lengths with that in mind.
Strategy ideas (educational)
1. Keltner trend pullback
In an up-trend with a rising EMA, pullbacks often hold near the EMA or the lower half of the channel. Traders watch for price to hold there and resume.
2. Donchian breakout
A close above the 20-period Donchian high marks a new range extreme. Classic trend systems used this as an entry, with the opposite or a shorter Donchian band as the exit. Because many breakouts fail, confirm with volume and use the breakout vs fakeout guide.
3. The Bollinger-Keltner squeeze
When Bollinger Bands contract inside the Keltner Channel, volatility has compressed unusually. Traders watch for the Bollinger Bands to expand back outside Keltner as a sign the compression is releasing. The squeeze tells you energy is building, not which direction it will go.
4. Donchian middle as trailing stop
Some trend followers trail stops at the Donchian middle line or a shorter Donchian low, which only moves when structure changes.
Real breakouts vs channel fakeouts
A close outside a channel is not the same as a trend. On range days price may poke outside the Keltner band or above a Donchian high and immediately return. These are often stop runs above obvious highs, the same liquidity that every trader can see.
Breakouts with more weight tend to close well beyond the band, come after compression, show rising volume, and be followed by a hold rather than an instant return. ADX climbing above 20 after the breakout is another supporting sign.
Combining channels with volume and footprint
Channels show where price is relative to recent volatility or extremes, but not who is trading. On a Donchian breakout, the footprint chart can show whether aggressive buyers drove price through the high with positive delta, or whether price drifted through on thin volume and met absorption. A rising cumulative delta while price rides the upper Keltner band supports the trend reading.
Worked NIFTY example (illustration)
Illustration with plausible numbers. NIFTY spends 11:00 to 13:30 in a tight range from 24,140 to 24,185. Bollinger Bands contract inside the Keltner Channel and the 20-period Donchian narrows to 45 points.
At 13:40 a candle closes at 24,198, above the Donchian high, with the highest volume since the morning and strong positive delta. Bollinger Bands expand outside Keltner. Price rides the upper Keltner band to 24,260 by 15:00 while the EMA rises. A trader studying this would note that a close back inside the old range, below 24,185, would have cancelled the breakout idea. Trading F&O carries a high risk of loss; this only illustrates how the channels behave.
Common mistakes
- Treating every touch of the upper Keltner band as a reversal; in trends price rides it.
- Acting on every Donchian breakout on range days.
- Forgetting that the squeeze has no direction.
- Using channel lengths without considering the 75-candle intraday session.
- No stop logic; channel width can be large after volatile periods.
Seeing it on the TradingMarble chart
On the TradingMarble chart you can add Keltner and Donchian Channels with your own settings on NIFTY, BANKNIFTY and F&O charts. With the footprint on the same screen, you can study whether channel breakouts came with real buying or selling. See features.
Channels checklist
- Is the channel rising, falling or flat?
- Is volatility compressed (squeeze, narrow Donchian)?
- Did the breakout close beyond the band with volume?
- Does delta confirm?
- Where would the idea be cancelled?
Keltner Channels show trend and normal volatility; Donchian Channels show range extremes. Used together they give a clear frame for trends, ranges and breakouts.
Frequently asked questions
What is the difference between Keltner Channels and Bollinger Bands?
Keltner Channels use an EMA with bands a multiple of ATR away, so they move smoothly. Bollinger Bands use a simple average with bands two standard deviations away, so they react more sharply to sudden moves. When Bollinger Bands move inside Keltner Channels, volatility is unusually compressed, called the squeeze.
What are the best Keltner Channel settings?
The common modern setting is a 20-period EMA with bands 2 × ATR(10) away. Some traders use 1.5 × ATR for tighter bands. On 5-minute NIFTY charts the default works as a starting point.
What is a Donchian Channel?
A Donchian Channel plots the highest high and lowest low of the last N periods, with a middle line halfway between. It shows where recent range extremes sit, and a break above the upper band means price has made a new N-period high.
What is the Turtle trading Donchian strategy?
The Turtle Traders used Donchian breakouts: a new 20-day or 55-day high or low as a trend entry, with a shorter Donchian channel such as 10 or 20 days as the exit. It was a long-term trend system, not an intraday method.
What is the Bollinger Keltner squeeze?
The squeeze happens when Bollinger Bands contract inside Keltner Channels, meaning standard deviation is unusually small compared with ATR. It shows volatility compression. Traders watch for the bands to expand again, but the squeeze itself does not tell direction.
Which is better for intraday, Keltner or Donchian?
They answer different questions. Keltner Channels help read trend strength and pullbacks; Donchian Channels mark exact range extremes for breakout studies. Many intraday traders use Keltner for context and Donchian highs and lows as reference levels.