Keltner Channel: Bands Moved by Volatility, Not by Price

The Keltner Channel is an indicator whose band width depends not on how far price has moved away from its average, but on how wide the candles themselves have become. The middle line is an exponential moving average of the closing price; the bands are set above and below it at a distance that is a multiple of the average true range (ATR). The main practical consequence follows from this: the channel widens when the market starts making broad swings and narrows when the daily range dries up — even if price itself is going nowhere. This sets it apart from indicators in which the width of the band is calculated from the dispersion of prices around the average.

What the channel is built from

The construction consists of a middle line and symmetrical bands:

• The middle line. An exponential moving average. Exponential rather than simple — and that is a deliberate choice: it reacts faster to recent bars and drags less of the old data along with it, so the centre of the channel does not lag a reversal as badly.
• The band offset. The ATR value multiplied by a factor that the trader sets. ATR measures the true range of a bar — the largest of the candle's own range and the gaps relative to the previous close — so opening gaps on the Russian market after a weekend or after corporate news are taken into account rather than ignored.

Historically, the first version of the indicator, proposed in the last century, was built on the typical price and a simple daily range. The variant with EMA and ATR took hold later and is now the default in trading terminals. If you are comparing your own settings with someone else's description, first check which version is meant — the lines on the chart will be different.

How it differs from neighbouring tools

The easiest way to understand Keltner is by comparison. In the Donchian Channel the bands are literally the extremes of the chosen period: the channel is drawn from the actual highs and lows and changes in jumps when an old extreme drops out of the window. Keltner's bands are smooth, because both EMA and ATR are smoothed values.

Bollinger Bands are closer in shape but fundamentally different in where the width comes from: there the offset is calculated through the standard deviation of price. Standard deviation responds to the dispersion of closes, ATR to the range of the bars as a whole. So on days when candles are long but close at roughly the same level, Keltner will widen noticeably more. The opposite situation — closes spreading out sharply while the candle bodies stay short — will push Bollinger Bands apart more. The common framework behind both approaches is covered in the piece on the price channel.

How the indicator is read in practice

There is a trend-following approach and a counter-trend approach, and they are the opposite of each other.

The trend-following reading. A close beyond the upper band is taken as a sign that the move is strong enough relative to the instrument's own volatility — a signal of continuation, not of reversal. The middle line then serves as a reference for managing the position: as long as price holds on its side of the EMA, the trend is considered alive.

The counter-trend reading. In a sideways market, a touch of the band is read as a local overextension, with the expectation of a return to the average. This works only where the market really is in a range, and it falls apart on the way out of it.

The two readings cannot be combined in one mechanical system — they give mutually exclusive commands on one and the same event. That is why the Keltner Channel is almost always used together with a market regime filter: the slope of the middle line, the behaviour of the channel width, a higher timeframe.

What matters for the Russian market

The width of the channel depends on the volatility of the security, so there are no single settings "for all instruments". A liquid blue chip such as {{instrument:SBER}} and an illiquid second-tier issuer will need different multipliers: where a touch of the band is a routine event for the former, for the latter it may be the result of a single trade. Before choosing parameters, look at the liquidity profile of the security in the list of Russian stocks.

A separate caveat concerns dates. A dividend record date, the publication of financial results and a key rate meeting all create gaps that mechanically inflate ATR and push the channel apart for several sessions ahead. This is not a surge in volatility in any meaningful sense, but a one-off event in the calculation base. It is useful to keep the corporate events calendar in front of you and to understand which widenings of the channel are explained by a date in the calendar rather than by the behaviour of the market.

Other indicators and the distinctions between them are collected in the site's glossary.