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Good Trading Guide

Keltner Channels Explained

Module 6B: Indicators · Lesson 8 of 10 · Back to course

Keltner Channels look a lot like Bollinger Bands: a middle line with a band above and below. The difference is in how the bands are measured. Bollinger Bands use standard deviation; Keltner Channels use ATR, which you met in Lesson 6B.5. That small change makes Keltner Channels smoother and steadier – which suits some uses and not others.

What it is

The idea is credited to Chester Keltner, who described a channel around a moving average in 1960. The version most platforms use today is a later update:

  • Middle line: a 20-period exponential moving average (EMA) of price.
  • Upper channel: the EMA plus a multiple of ATR (commonly 2 × ATR).
  • Lower channel: the EMA minus the same multiple of ATR.

ATR settings vary by platform (10 and 20 are both common), so check yours. Keltner Channels are an overlay and belong to the volatility family.

How it’s calculated (in plain English)

  1. Work out the 20-period EMA of closing prices – a moving average that leans towards recent candles.
  2. Work out the ATR – the average true range over the chosen number of candles (see Lesson 6B.5).
  3. Upper channel = EMA + (2 × ATR).
  4. Lower channel = EMA − (2 × ATR).

That’s it. Because ATR changes gradually, the channel widens and narrows more smoothly than Bollinger Bands, which can balloon after a single large candle.

Keltner vs Bollinger

Bollinger Bands Keltner Channels
Middle line 20 SMA 20 EMA
Band width based on Standard deviation of closes ATR (true range, includes gaps)
Behaviour Expands and contracts sharply Smoother, steadier
Common use Squeezes, mean reversion Trend channels, trailing references

Some traders plot both. When the Bollinger Bands move inside the Keltner Channels, volatility has dropped unusually low – a setup some traders call a “squeeze”. As with Bollinger squeezes, it says nothing about which way price will break.

How traders use it

1. Trend context. In a steady uptrend, price often stays in the upper half of the channel, and pullbacks to the middle EMA are a common reference point – similar to the logic of the Moving Average Pullback Strategy.

2. Breakout context. A close outside the channel shows an unusually large move compared with recent volatility. Some traders treat that as a sign of strength, others as overstretched. Your plan has to decide.

3. Trailing stops. Some traders trail a stop along the middle line or the opposite channel. Because the channel is ATR-based, the trail automatically widens when the market gets busier.

4. Ranges. When the channel flattens and price swings between the upper and lower lines, some traders treat the edges as context for range trades, alongside clear levels like those in the Support and Resistance Bounce Strategy.

Common mistakes

  • Treating a channel touch as a signal. As with Bollinger Bands, price can ride the upper channel in a strong trend.
  • Using Keltner, Bollinger and ATR as three confirmations. They all measure volatility.
  • Not checking the settings. Different platforms use different ATR periods and multipliers, so your channel may not match the one in a video or book.
  • Expecting a squeeze to predict direction. It doesn’t.
  • Ignoring gaps. Because ATR includes gaps, a big weekend gap can widen the channel for days afterwards.

Example (illustrative numbers)

All figures are made up for teaching purposes. They aren’t real prices or a trade idea.

On a 4-hour GBP/USD chart:

  • 20-period EMA = 1.2650
  • ATR = 0.0040 (40 pips)
  • Upper channel = 1.2650 + (2 × 0.0040) = 1.2730
  • Lower channel = 1.2650 − (2 × 0.0040) = 1.2570

The channel is 160 pips wide. Suppose price closes at 1.2745 – outside the upper channel. That’s a move larger than recent volatility would usually suggest. One plan might say “strong momentum: look for a pullback towards the EMA before considering a buy”. Another might say “stretched: no new buys until price is back inside”. Neither knows what price will do next; each just has a pre-written answer to the situation.

If the trader in the first plan did buy, an ATR-based stop of 1.5 × ATR = 60 pips would size the position as shown in Lesson 6B.5.

The prop firm angle

Keltner Channels are mainly useful in a challenge as a calm, rules-based reference:

  • An ATR-based channel adjusts to volatility automatically, which supports consistent position sizing and stop placement.
  • Using the middle EMA as a “no trades against it” filter can reduce counter-trend losing streaks.
  • Don’t stack it with Bollinger Bands and ATR expecting three separate signals – pick the volatility tool that fits your plan and test it on demo (Module 13).

Key takeaways

  • Keltner Channels = 20 EMA ± a multiple of ATR (often 2 × ATR).
  • They’re smoother than Bollinger Bands because ATR changes gradually.
  • Closes outside the channel show unusually large moves; your plan decides what that means.
  • Keltner, Bollinger and ATR are all volatility tools – one is usually enough.

Quick quiz

  1. What’s the main difference between Keltner Channels and Bollinger Bands? (Keltner uses ATR for band width; Bollinger uses standard deviation.)
  2. EMA 8,000, ATR 30 points, multiplier 2: where are the channels? (8,060 and 7,940.)
  3. Why do Keltner Channels usually look smoother? (ATR changes gradually, while standard deviation can jump after a single big candle.)
  4. What does it mean when Bollinger Bands sit inside the Keltner Channels? (Volatility is unusually low – a “squeeze” – but it doesn’t predict direction.)
  5. Why might your Keltner Channel differ from one in a video? (Platforms use different ATR periods and multipliers.)

Key terms

Keltner Channels · ATR · Exponential moving average (EMA) · Squeeze · Trailing stop · Volatility · Also see Trading jargon in plain English.

Try this

On a demo chart, add Keltner Channels (20 EMA, 2 × ATR) and Bollinger Bands (20, 2) to the same 4-hour chart. Find two periods where the Bollinger Bands moved inside the Keltner Channels. Note which way price broke out and whether the move lasted. Then remove whichever tool you found harder to read.

FAQ

What are the standard Keltner Channel settings? A 20-period EMA with bands at 2 × ATR is common. ATR periods of 10 or 20 are both used – check your platform.

Are Keltner Channels better than Bollinger Bands? Neither is better. Keltner is smoother; Bollinger reacts faster to changes in volatility.

Can I use Keltner Channels for stop-losses? Some traders trail stops along the middle line or the opposite channel. Any stop method should be tested, and stops can still be skipped in fast markets.

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6B.9 Divergence →

Disclaimer: This page is general education, not financial or investment advice or a personal recommendation, and it doesn’t take your circumstances into account. Examples are hypothetical, for illustration only, and not an invitation to buy or sell. Learning a strategy doesn’t guarantee profits. Past performance is not a reliable guide to future results. Futures, spread bets and CFDs are complex and carry a high risk of losing money quickly because of leverage, and most retail traders lose money. With a real futures account, losses can exceed your deposit. Only trade with money you can afford to lose, and speak to an independent FCA-authorised adviser if you’re unsure. Read our full risk warning.