STOCHF

Summary

Fast Stochastic Oscillator: the raw %K line and its moving-average-smoothed %D line. Unlike STOCH (which slows both lines), STOCHF returns the unsmoothed FastK and FastD. Oscillates 0-100; >80 overbought, <20 oversold.

Formula

FastK = 100 * (Close - LowestLow) / (HighestHigh - LowestLow), over the last FastK_Period bars (incl. today) FastD = MA(FastK, FastD_Period, FastD_MAType)

Notes

When the high-low range over the window is zero, %K is set to 0 instead of being undefined.

Inputs

inPriceHLC — High/Low/Close price series

Outputs

outFastK — Raw %K stochastic line
outFastD — MA-smoothed %K (signal line)

Parameters

optInFastK_Period — Lookback window for the highest-high/lowest-low of Fast-K
optInFastD_Period — Smoothing period for the Fast-D line
optInFastD_MAType — Moving-average type used to smooth Fast-D

Implementation

TA-Lib Definition: stochf.c · stochf.yaml

Native	File
C	`ta_STOCHF.c`
Rust	`stochf.rs`
Java	`Core.java`

TA-Lib is also available for Python, R and more using a wrapper.

Aliases

Stochastic Fast, Fast Stochastic Oscillator