Untitled

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © PineCodersTASC

//  TASC Issue: April 2024 - Vol. 42, Issue 4
//     Article: The Ultimate Smoother.
//              Smoothing data with less lag.
//  Article By: John F. Ehlers
//    Language: Pine-compatible v5
// Provided By: PineCoders, for tradingview.com
// ------------------------------------------------------------------------------------------------
// Original author:  PineCodersTASC
// Original title:   TASC 2024.04 The Ultimate Smoother
// Licence:          MPL-2.0 (the header above is the original notice, kept verbatim)
// Pine version:     5
// Fetched:          2026-10-12
// Ported to FloScript by FloSignals; modifications under MPL-2.0.
// Converter:        @flosignals/floscript 0.1.0, strict mode, score 100/100
// ------------------------------------------------------------------------------------------------
//@floscript=1
//@version=5

string title = 'TASC 2024.04 The Ultimate Smoother'
string stitle = 'US'
indicator(title, stitle, true)

// --- Inputs ---
int periodInput = input.int(20, "Critical Period:")
float sourceInput = input.source(close, "Source Series:")

// --- Functions ---
// @function      The UltimateSmoother is a filter created
//                by subtracting the response of a high-pass
//                filter from that of an all-pass filter.
// @param src     Source series.
// @param period  Critical period.
// @returns       Smoothed series.
UltimateSmoother(float src, int period) =>
    float a1 = math.exp(-1.414 * math.pi / period)
    float c2 = 2.0 * a1 * math.cos(1.414 * math.pi / period)
    float c3 = -a1 * a1
    float c1 = (1.0 + c2 - c3) / 4.0
    float us = src
    if bar_index >= 4
        us := (1.0 - c1) * src + (2.0 * c1 - c2) * src[1] - (c1 + c3) * src[2] + c2 * nz(us[1]) + c3 * nz(us[2])
    us

// --- Plotting ---
plot(UltimateSmoother(sourceInput, periodInput), 'US', color.blue, 2)

This file is under the Mozilla Public License 2.0; it is a port of the original by PineCodersTASC, with the original licence header kept and the changes made for FloScript noted in the file.

• v22026-10-14

  Library refresh 2026-10-14

• v12026-10-12

  Library refresh 2026-10-12