Kairi Relative Index (KRI): Free TradingView Indicator (Pine Script)

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

45 lines of Pine Script v6 from lib/oscillators/kri/kri.pine, published under Apache-2.0. Keep the author's credit and licence lines when you reuse it.

kri.pine

// Licensed under the Apache License, Version 2.0
// © mihakralj
//@version=6
indicator("Kairi Relative Index (KRI)", "KRI", overlay=false, precision=4)

//@function Kairi Relative Index: percentage deviation of source from its SMA
//@param source Series to analyze
//@param period SMA lookback period
//@returns 100 * (source - SMA) / SMA
//@optimized O(1) per bar via circular buffer with running sum
kri(series float source, simple int period) =>
    if period <= 0
        runtime.error("Period must be greater than 0")

    var array<float> buffer = array.new_float(period, na)
    var int head = 0
    var float sum = 0.0
    var int count = 0

    float oldest = array.get(buffer, head)
    if not na(oldest)
        sum -= oldest
    else
        count += 1

    float current = nz(source)
    sum += current
    array.set(buffer, head, current)
    head := (head + 1) % period

    float sma = sum / math.max(1, count)
    sma != 0.0 ? 100.0 * (current - sma) / sma : 0.0

// ---------- Main loop ----------

// Inputs
i_source = input.source(close, "Source")
i_period = input.int(14, "Period", minval=1, maxval=5000, tooltip="SMA lookback period")

// Calculation
float result = kri(i_source, i_period)

// Plot
plot(result, "KRI", color=color.yellow, linewidth=2)
hline(0, "Zero", color=color.gray, linestyle=hline.style_dotted)

Overview

Kairi Relative Index (KRI) plots the resulting KRI value as a yellow line in a separate pane along with a dotted gray zero line. Users can select any source series and set the SMA lookback period. The indicator employs an O(1) streaming algorithm using a circular buffer with running sum for efficient calculation. It draws on the chart in a dedicated pane.

Kairi Relative Index
percentage deviation
SMA lookback
separate pane
O(1) streaming

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.

File

lib/oscillators/kri/kri.pine

Repository

github.com/mihakralj/QuanTAlib. See its other scripts in the library

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`
Period	`int`	`14`	`i_period`

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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