The Adaptive Laguerre Filter calculates a smoothed, dynamically adjusted trendline plotted directly on the main price chart. It dynamically adjusts its damping factor (alpha) based on recent price range variations and median percentile calculations over a spec
Indicator · Pine Script v6 · On the chart
Exponential Decay (EDECAY)
This indicator plots an exponential decay envelope on the price chart.
GitHub stars99on the repository
Pine versionv6current
Lines of code33
Settings2inputs
LicenceApache-2.0
Last update4 weeks ago27 Sep 2026
Add It to Your TradingView Chart
- 1Copy the scriptPress Copy script above, or the copy button on the code below.
- 2Open the Pine EditorOpen a TradingView chart and choose Pine Editor at the bottom of the screen.
- 3Paste over the templateCreate a new indicator, select all of the template text and paste. Press Save and give it a name.
- 4Add it to the chartPress Add to chart, then adjust the settings with the gear icon next to its name.
Source Code
33 lines of Pine Script v6 from lib/numerics/edecay/edecay.pine, published under Apache-2.0. Keep the author's credit and licence lines when you reuse it.
// Licensed under the Apache License, Version 2.0
// © mihakralj
//@version=6
indicator("Exponential Decay (EDECAY)", "EDECAY", overlay=true)
//@function Calculates exponential decay: output = max(input, prev_output * (period-1)/period)
//@param source Source price series
//@param length Decay period
//@returns Decayed value that tracks peaks and descends exponentially
//@optimized Uses multiplicative decay factor for O(1) complexity per bar
edecay(series float source, simple int length) =>
var float prev = na
float scale = (length - 1.0) / length
float result = na
if na(prev)
result := source
else
float d = prev * scale
result := source > d ? source : d
prev := result
result
// ---------- Main loop ----------
// Inputs
i_source = input.source(close, "Source")
i_length = input.int(5, "Length", minval=1)
// Calculate Edecay
float edecay_val = edecay(i_source, i_length)
// Plot
plot(edecay_val, "Edecay", color=color.yellow, linewidth=2)
Overview
Each bar it keeps the source value when it exceeds the previous result, otherwise it multiplies the previous result by (length minus one) divided by length so the line falls exponentially after peaks. The source input selects the series and the length input sets the decay period. It draws one line in the price pane and does not generate trade entries, exits, or stops.
- Peak-tracking exponential decay
- Source and length inputs
- Constant-time update per bar
- Single overlay line plot
Details
Published by
mihakralj on GitHub
Type
Indicator, Pine Script v6
Draws
On the price chart
Markets
Any symbol
Timeframes
Any timeframe
Risk Notes
No repainting, lookahead or stacked entries were found in its code or README. That says nothing about how well it works: test it first.
Topics
algorithmic-tradingcsharpdotnetpinescriptpythonquantitative-financesimdta-libtechnical-analysistechnical-indicators
Settings
The inputs you can change from the gear icon on the chart. Defaults are the author's.
| Setting | Type | Default | Variable |
|---|---|---|---|
| Source | source | close | i_source |
| Length | int | 5 | i_length |
Third-party code. ForexR did not write, test or endorse this script, and the summary above was generated automatically from its code and README. Indicators describe the past, and a strategy's backtest can look better than live trading, especially when a script repaints. Check it in the Strategy Tester and on a demo account before you rely on it.
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