CCI (Commodity Channel Index) explained

Momentum

What CCI measures

CCI measures how far price has deviated from its statistical mean, expressed in units of mean absolute deviation. Originally designed for commodities, it works on any asset. Unlike RSI/Stochastic which are bounded 0-100, CCI is unbounded and can reach extreme values during strong trends. It identifies overbought/oversold conditions and trend direction.

How CCI readings are interpreted

Values above +100 indicate price is significantly above its mean — a potential overbought zone or the start of a strong uptrend. Below -100 indicates the opposite. In trending markets, sustained readings above +100 confirm a bullish trend. Crossovers of the zero line signal trend changes. Divergence from price warns of reversals.

Conventional CCI levels

Above +100: Strong upward move — overbought OR trend confirmation
Below -100: Strong downward move — oversold OR trend confirmation
Zero line cross from below: bullish trend signal
Zero line cross from above: bearish trend signal
Above +200 or below -200: extreme move, high reversal probability

Where CCI works, and where it does not

Versatile — works in both trending and ranging markets by adjusting interpretation. In ranges: use ±100 as overbought/oversold. In trends: use ±100 as continuation signals (staying above +100 = strong uptrend). Works well on commodities, forex, and crypto.

Indicators commonly read alongside CCI

Bollinger Bands: CCI extreme + price at band extreme = high-conviction reversal
ADX: When ADX is above 25, CCI stays above +100 for longer, and extremes are not conventionally read as reversals
Moving Averages: CCI above zero + price above 50 EMA = confirmed trend

Known limitations of CCI

CCI unbounded nature makes setting targets/stops harder than RSI
In high-volatility assets, ±100 is trivial — use ±200 as thresholds instead
Short-term CCI (5–7 period) is extremely noisy on short timeframes

CCI in practice

In trend-following approaches, a cross above +100 from below is conventionally treated as trend confirmation, and the reading is watched until it falls back below +100
In range-trading approaches, ±100 are conventionally read as stretched levels, with ±200 often used as the outer bound
The zero-line cross on daily data is a widely used trend-change marker
A 14-period ATR is commonly paired with CCI to frame the typical range

Other momentum indicators

Williams %R
ROC — Rate of Change
Momentum (MOM)
TRIX

Testing ideas built on CCI

A reading of CCI can be written as an exact rule and checked against historical data — as a full strategy with entries, exits and costs, or as a single condition and what followed it:

How to backtest a trading strategy without code
Event analysis: what follows a market event

Plot it yourself. Add this indicator to a chart, change every parameter and watch the line move, then backtest how the rule would have behaved on historical data — free on the S&P 500 ETF, no card.

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This is reference material, not advice. It describes what each indicator measures and how its readings are conventionally interpreted. Nothing here is a recommendation to buy or sell anything, and no indicator predicts future prices. GU Analyser is an analytical tool — no money is ever traded here.