Chande Momentum Oscillator

Momentum

What it measures

CMO is closely related to RSI — both measure the balance of up-moves versus down-moves over a lookback period — but CMO uses the raw sum of up and down moves directly rather than RSI's smoothed (Wilder) averaging, and it's scaled to oscillate symmetrically from -100 to +100 around a zero midpoint instead of RSI's 0–100 scale around 50.

How readings are interpreted

Positive CMO means up-moves have dominated the lookback period; negative means down-moves have dominated. Because CMO uses raw sums rather than smoothed averages, it tends to be somewhat more responsive (and noisier) than RSI on the same lookback period. The zero line in CMO plays the same role as the 50 line in RSI.

Conventional levels

Above +50: overbought (roughly equivalent to RSI above 75)
Below -50: oversold (roughly equivalent to RSI below 25)
Crossing zero: momentum balance shifting, similar to RSI crossing 50
Divergence between CMO and price is interpreted the same way as RSI divergence

Where it works, and where it does not

Best suited to the same ranging/mildly-trending conditions as RSI — in strong sustained trends CMO can stay pinned at an extreme for a long time. Because it's more responsive than RSI, it's somewhat more prone to false signals in choppy conditions.

Commonly read alongside

RSI: The two will usually agree directionally — CMO is best thought of as a more sensitive variant rather than an independent confirmation
ADX: Only trust CMO overbought/oversold extremes when ADX confirms a ranging market
Bollinger Bands: CMO extreme + price at the outer band is a stronger mean-reversion setup than either alone

Known limitations

Being more responsive than RSI also means more false signals in choppy markets
In strong trends, CMO extremes are continuation signals, not reversal signals — the same trap RSI falls into
Less widely used than RSI, so there's less consensus on ideal threshold levels across different securities

In practice

Treat as a faster, noisier cousin of RSI rather than a fundamentally different tool
Combine with a trend filter (only fade CMO extremes when ADX is low) to avoid the strong-trend trap
Because of its extra sensitivity, consider a slightly longer lookback period than the RSI default if using it for entries
Works reasonably as a secondary confirmation alongside RSI rather than as a replacement for it

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.