Asymmetrical RSI is an indicator that computes a custom relative strength index from the rate of change of a user-selected source. It plots the resulting ARSI line in a separate pane with color coding that turns green above the overbought level and red below t
Indicator · Pine Script v6 · Own pane
Mean Arctangent Absolute Percentage Error
This indicator calculates the Mean Arctangent Absolute Percentage Error between two data series over a specified rolling window.
GitHub stars99on the repository
Pine versionv6current
Lines of code36
Settings3inputs
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
36 lines of Pine Script v6 from lib/errors/maape/maape.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("Mean Arctangent Absolute Percentage Error", "MAAPE", overlay=false, format=format.percent)
//@function Calculates Mean Arctangent Absolute Percentage Error
//@param actual Series of actual values
//@param predicted Series of predicted/forecast values
//@param length Rolling window for averaging
//@returns MAAPE value (0 to ~1.5708)
maape(series float actual, series float predicted, simple int length) =>
float epsilon = 1e-10
// Compute arctangent percentage error for current bar
float absActual = math.abs(nz(actual, 0.0))
float absError = math.abs(nz(actual, 0.0) - nz(predicted, 0.0))
float atanError = absActual > epsilon ? math.atan(absError / absActual) : math.pi / 2.0
// Rolling mean of arctangent errors
float result = ta.sma(atanError, length)
result
// ---------- Main loop ----------
// Inputs
i_length = input.int(14, "Length", minval=1)
i_actual = input.source(close, "Actual")
i_predicted = input.source(open, "Predicted")
// Calculation
maape_value = maape(i_actual, i_predicted, i_length)
// Plot
plot(maape_value, "MAAPE", color=color.yellow, linewidth=2)
hline(0, "Zero", color=color.gray, linestyle=hline.style_dotted)
hline(math.pi / 2.0, "Max (π/2)", color=color.red, linestyle=hline.style_dotted)
Overview
Mean Arctangent Absolute Percentage Error evaluates the absolute difference between an actual source and a predicted source, scaling errors via the arctangent function. The script plots the resulting error line in a separate pane alongside reference levels at zero and maximum values. Input settings allow users to adjust the rolling length as well as the price sources for both inputs. The script serves purely as a measurement tool and does not generate trading signals.
- Mean arctangent absolute percentage error calculation
- Rolling simple moving average window
- Configurable actual and predicted price sources
- Upper and lower boundary reference lines
Details
Published by
mihakralj on GitHub
Type
Indicator, Pine Script v6
Draws
Separate pane below the 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 |
|---|---|---|---|
| Length | int | 14 | i_length |
| Actual | source | close | i_actual |
| Predicted | source | open | i_predicted |
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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