The Stochastic Oscillator compares a stock's closing price to its price range over a specified period. Like RSI, it oscillates between 0 and 100. It is particularly effective at identifying overbought and oversold conditions in range-bound markets.

Stochastic Formula (Default: 14, 3, 3) %K = ((Close − Lowest Low) ÷ (Highest High − Lowest Low)) × 100 %D = SMA(3) of %K — the signal line

Reading the Stochastic

LevelSignalAction
Above 80OverboughtPrepare for potential sell
50–80BullishUpward momentum
Below 20OversoldPrepare for potential buy
20–50BearishDownward momentum

%K and %D Crossover

Bullish Signal: %K crosses above %D while both are below 20 (oversold zone)
Bearish Signal: %K crosses below %D while both are above 80 (overbought zone)
The crossover in the extreme zones is much more reliable than crossovers in the middle.

Stochastic Divergence

Like RSI, Stochastic divergence often signals reversals before they happen:

Bullish Divergence: Price makes a lower low, Stochastic makes a higher low while below 20
Bearish Divergence: Price makes a higher high, Stochastic makes a lower high while above 80

Stochastic Settings

Settings (%K, %D, Smooth)TypeBest For
14, 3, 3 (default)Slow StochasticSwing trading, less noise
5, 3, 3Fast StochasticIntraday, more signals
21, 5, 5Smooth StochasticPositional, fewer false signals
Use Stochastic on a higher timeframe to determine direction, then use it on a lower timeframe to time entries. For example: weekly Stochastic shows oversold → daily Stochastic shows %K crossing above %D → enter long.

Stochastic vs RSI

FeatureStochasticRSI
Based onPrice rangeAverage gain vs loss
Signal speedFasterSlower
False signalsMoreFewer
Best marketRange-boundTrending