QuanTAlib/lib/oscillators/_index.md

Oscillators

Oscillators fluctuate above and below a centerline or within bounded ranges. Useful for identifying overbought/oversold conditions, momentum shifts, and divergences. Best in ranging markets; trend-following indicators work better in trending markets.

Indicator	Full Name	Description
AC	Acceleration Oscillator	Second derivative of AO. Measures acceleration of market driving force.
AO	Awesome Oscillator	5-period SMA minus 34-period SMA of bar midpoint. Bill Williams creation.
APO	Absolute Price Oscillator	Raw currency difference between fast and slow EMAs. Unbounded.
BBB	Bollinger %B	Position within Bollinger Bands. 0=lower band, 1=upper band.
BBI	Bulls Bears Index	Multi-period SMA composite. Measures aggregate trend strength.
BBS	Bollinger Band Squeeze	BB width < KC width indicates consolidation. Breakout imminent.
BRAR	BRAR	Bull-Bear power ratio from open-relative ranges. Japanese origin.
BW_MFI	Bill Williams MFI	MFI with 4-zone classification: Green (trend), Fade (fading), Fake (unsupported), Squat (breakout imminent).
CFO	Chande Forecast Oscillator	Percentage difference between price and linear regression forecast. Also known as FOSC.
COPPOCK	Coppock Curve	Long-term momentum via weighted sum of ROC periods. Buy signals only.
CRSI	Connors RSI	Composite of RSI, streak RSI, and percentile rank. Mean-reversion.
CTI	Ehlers Correlation Trend Indicator	Linear regression correlation coefficient as trend strength.
DECO	Ehlers Decycler Oscillator	Dual HP bandpass isolating intermediate-frequency market cycles.
DEM	DeMarker Oscillator	Bounded 0-1 oscillator comparing sequential highs and lows.
DOSC	Derivative Oscillator	Double-smoothed RSI minus signal line. Momentum acceleration.
DPO	Detrended Price Oscillator	Removes trend via displaced SMA. Reveals cycles.
DSO	Ehlers Deviation-Scaled Oscillator	SSF-filtered zeros with RMS normalization and Fisher Transform. TASC Oct 2018.
DSTOCH	Double Stochastic (Bressert)	Stochastic applied to Stochastic with EMA smoothing. Bounded 0-100.
DYMI	Dynamic Momentum Index	RSI with volatility-adaptive period. Shorter in volatile markets.
EEO	Ehlers Elegant Oscillator	IFT of RMS-normalized momentum with Super Smoother. TASC Feb 2022.
ER	Efficiency Ratio	Measures directional efficiency. Net movement / total path length.
ERI	Elder Ray Index	Separates bull and bear power relative to EMA.
FI	Force Index	Combines price change, direction, and volume to measure buying/selling power.
FISHER	Ehlers Fisher Transform	Converts prices to Gaussian distribution. Sharp reversals.
FISHER04	Ehlers Fisher Transform (2004)	Cybernetic Analysis variant with gentler arctanh scaling.
GATOR	Williams Gator Oscillator	Dual histogram from Alligator SMMA lines. Visualizes trend convergence/divergence.
IMI	Intraday Momentum Index	RSI variant using open-close range. Intraday overbought/oversold 0-100.
INERTIA	Inertia	Linear regression residual. Raw deviation from trend forecast.
KDJ	KDJ Indicator	Enhanced Stochastic. J = 3K - 2D provides leading signal.
KRI	Kairi Relative Index	Percentage deviation of price from SMA. Overbought/oversold.
KST	KST Oscillator	Summed weighted ROCs across 4 timeframes. Martin Pring.
LRSI	Ehlers Laguerre RSI	RSI computed over Laguerre filter stages. Single γ trades lag vs smoothness. Output [0,1].
MADH	Ehlers Moving Average Difference with Hann	Dual Hann FIR difference. Zero-crossing trend oscillator. TASC Nov 2021.
MARKETFI	Market Facilitation Index	Bill Williams' price-range-per-unit-of-volume efficiency measure. O(1), no period.
MSTOCH	Ehlers MESA Stochastic	Hilbert Transform cycle-tuned Stochastic. Adaptive period.
PGO	Pretty Good Oscillator	Distance from SMA normalized by ATR. Units: ATR multiples.
PSL	Psychological Line	Ratio of up periods to total periods. Crowd sentiment gauge.
QQE	Quantitative Qualitative Estimation	Smoothed RSI with dynamic volatility bands.
REFLEX	Ehlers Reflex	Ehlers zero-centered reversal oscillator using super smoother with normalized sum-of-differences.
REVERSEEMA	Ehlers Reverse EMA	8-stage cascaded Z-transform inversion subtracts EMA lag, producing zero-centered oscillator signal.
RRSI	Ehlers Rocket RSI	Fisher Transform of Super Smoother–filtered RSI. Sharp cyclic reversal signals.
RSIH	Ehlers Hann-Windowed RSI	Hann-weighted CU/CD RSI, zero-mean [-1, +1]. FIR filter. TASC Jan 2022.
RVGI	Ehlers Relative Vigor Index	Open-close vs high-low ratio with SMA smoothing. Measures conviction.
SMI	Stochastic Momentum Index	Distance from range midpoint. More sensitive than classic Stochastic.
SQUEEZE	Squeeze	BB width < KC width indicates consolidation. Breakout imminent.
SQUEEZE_PRO	Squeeze Pro	Multi-level BB vs KC squeeze (wide/normal/narrow) with MOM-smoothed momentum. LazyBear.
STC	Schaff Trend Cycle	MACD + double Stochastic smoothing. Fast momentum oscillator (0-100).
STOCH	Stochastic Oscillator	Close position within N-period high-low range. Classic overbought/oversold.
STOCHF	Stochastic Fast	Unsmoothed Stochastic. Faster but noisier.
STOCHRSI	Stochastic RSI	Stochastic applied to RSI. More sensitive than either alone.
TD_SEQ	TD Sequential	DeMark sequential countdown. Exhaustion pattern recognition.
TRENDFLEX	Ehlers Trendflex	Ehlers zero-lag trend oscillator using super smoother with sum-of-differences normalization.
TRIX	Triple Exponential Average	ROC of triple EMA. Filters noise through three smoothings.
TTM_WAVE	TTM Wave	Fibonacci-period MACD composite (Waves A/B/C). John Carter.
ULTOSC	Ultimate Oscillator	Multi-timeframe oscillator. Combines 7, 14, 28 period buying pressure.
USI	Ehlers Ultimate Strength Index	Symmetric RSI replacement using UltimateSmoother. [-1, +1]. TASC Nov 2024.
WILLR	Williams %R	Inverse Stochastic. -100 to 0 range. Overbought/oversold.