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QuanTAlib/lib/cycles/_index.md
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Miha Kralj 3dd05f23e4 Refactor indicators to include "Ehlers" in names and descriptions for clarity
- Updated the name and description of the Hilbert Trendline (HTIT) to "Ehlers Hilbert Transform Instantaneous Trend (HTIT)".
- Changed the name and description of the MESA Adaptive Moving Average (MAMA) to "Ehlers MESA Adaptive Moving Average".
- Modified the Center of Gravity (CG) indicator to "Ehlers Center of Gravity (CG)".
- Renamed the Detrended Synthetic Price (DSP) to "Ehlers Detrended Synthetic Price (DSP)".
- Updated the Autocorrelation Periodogram (EACP) to "Ehlers Autocorrelation Periodogram (EACP)".
- Changed the Homodyne Discriminator (HOMOD) to "Ehlers Homodyne Discriminator (HOMOD)".
- Updated the Hilbert Transform Dominant Cycle Period and Phase indicators to include "Ehlers" in their names.
- Renamed the Hilbert Transform Phasor Components to "Ehlers Hilbert Transform Phasor Components (HT_PHASOR)".
- Updated the SineWave indicator to "Ehlers Hilbert Transform SineWave (HT_SINE)".
- Changed the Phasor Analysis indicator to "Ehlers Hilbert Transform Phasor Components (HT_PHASOR)".
- Updated the SSF-Based Detrended Synthetic Price to "Ehlers SSF Detrended Synthetic Price (SSFDSP)".
- Renamed the Ultimate Channel to "Ehlers Ultimate Channel (UCHANNEL)".
- Added new indicators: Moving Average Variable Period (MAVP), Ehlers Predictive Moving Average (PMA), Ehlers Reverse EMA (REVERSEEMA), and Ehlers Trendflex Indicator (TRENDFLEX).
- Updated various SVG badges to reflect changes in classes, comments, source files, lines of code, methods, and public types.
2026-02-18 19:08:15 -08:00

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Cycles

"The market is a discounting mechanism that anticipates cycles before they complete." Unknown

Cycle analysis identifies repeating patterns in price data. John Ehlers pioneered digital signal processing techniques for financial cycles, using Hilbert transforms and autocorrelation to detect dominant periods. Cycles exist but are non-stationary: period and amplitude shift over time.

Indicators

Indicator Full Name Description
CG Ehlers Center of Gravity Ehlers. Weighted sum position. Minimal lag cycle indicator.
DSP Ehlers Detrended Synthetic Price Removes trend to reveal underlying cycles.
EACP Ehlers Autocorrelation Periodogram Ehlers. Spectral analysis via autocorrelation. Detects dominant period.
EBSW Ehlers Even Better Sinewave Ehlers. Improved sinewave extraction. Reduces false signals.
HOMOD Ehlers Homodyne Discriminator Dominant cycle detection via homodyne technique.
HT_DCPERIOD Ehlers Hilbert Transform Dominant Cycle Period Ehlers Hilbert Transform. Measures current cycle length.
HT_DCPHASE Ehlers Hilbert Transform Dominant Cycle Phase Ehlers Hilbert Transform. Measures current position in cycle.
HT_PHASOR Ehlers Hilbert Transform Phasor Components Ehlers. In-phase and quadrature components.
HT_SINE Ehlers Hilbert Transform SineWave Ehlers Hilbert Transform. Sine and lead sine for cycle timing.
LUNAR Lunar Phase 29.5-day lunar cycle. Studied for market correlations.
SINE Ehlers Sine Wave Ehlers. Basic sinewave indicator for cycle mode.
SOLAR Solar Activity Cycle ~11-year sunspot cycle. Long-term research indicator.
SSFDSP Ehlers SSF Detrended Synthetic Price Super Smoother Filter based DSP. Cleaner cycle extraction.
STC Schaff Trend Cycle MACD + double Stochastic smoothing. Fast cycle oscillator (0-100).