Technical analysis · updated October 21, 2026
What is CCI (commodity channel index)
CCI shows how far today's price is from the average of the last 20 days, compared with how far it usually strays. Despite the name, which comes from commodities, it is used for any stock.
CCI formula
CCI=Typical price − 20-day average of the typical price0.015 × Mean deviation
- Typical price
- (High + low + close of the day) ÷ 3.
- Mean deviation
- How far, on average, the typical price strayed from its average.
- 0.015
- A constant chosen so that most values fall between −100 and +100.
How to read CCI
Below −100well below the average
−100 to 100normal
Above 100well above the average
As with RSI, extreme values can stay extreme for a long time in a strong trend.
When CCI can fool you
Noisy: it changes quickly and gives many day-to-day signals.
Related terms
Questions about CCI
CCI or RSI?
They show similar things. CCI has no fixed limits; RSI always stays between 0 and 100.
These explanations are for information only. They are not a recommendation to buy or sell.
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