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feat: add FSI (Ehlers Fourier Series Indicator, TASC June 2019)

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Miha Kralj
2026-03-18 19:58:53 -07:00
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docs/indicators.md
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@@ -441,6 +441,7 @@ Periodic pattern detection and dominant frequency extraction. Markets exhibit cy
| [**CCYC**](../lib/cycles/ccyc/Ccyc.md) | Ehlers Cyber Cycle | 4-tap FIR + 2-pole high-pass IIR cycle extraction |
| [**CG**](../lib/cycles/cg/Cg.md) | Ehlers Center of Gravity | Ehlers cycle measurement |
| [**DSP**](../lib/cycles/dsp/Dsp.md) | Ehlers Detrended Synthetic Price | Cycle-isolated price component |
| [**FSI**](../lib/cycles/fsi/Fsi.md) | Ehlers Fourier Series Indicator | 3-harmonic bandpass + amplitude-weighted reconstruction |
| [**ACP**](../lib/cycles/acp/Acp.md) | Ehlers Autocorrelation Periodogram | Ehlers dominant cycle detection |
| [**EBSW**](../lib/cycles/ebsw/Ebsw.md) | Ehlers Even Better Sinewave | Ehlers improved cycle indicator |
| [**HOMOD**](../lib/cycles/homod/Homod.md) | Ehlers Homodyne Discriminator | Dominant cycle period tracking |