The Derivative Oscillator calculates a double-exponentially smoothed Relative Strength Index (RSI) and subtracts its Simple Moving Average (SMA) to form the main oscillator line. A secondary signal line is plotted using an SMA of the main oscillator values. Th
Indicator · Pine Script v6 · Own pane
Bias (BIAS)
This indicator calculates Bias as the relative deviation of a chosen source from its simple moving average, using (source minus average) divided by the average.
GitHub stars99on the repository
Pine versionv6current
Lines of code46
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
46 lines of Pine Script v6 from lib/momentum/bias/bias.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("Bias (BIAS)", "BIAS", overlay=false)
//@function Calculates the deviation of a signal from its moving average (BIAS).
//@param src The source series.
//@param len The lookback period for the SMA. Must be > 0.
//@returns The BIAS value.
//@optimized for performance and dirty data
bias(series float src, int len) =>
if len <= 0
runtime.error("BIAS length must be greater than 0")
var float sma_sum = 0.0
var float[] sma_buffer = array.new_float(len, na)
var int sma_head = 0
var int sma_validCount = 0
float sma_oldestVal = array.get(sma_buffer, sma_head)
if not na(sma_oldestVal)
sma_sum -= sma_oldestVal
else if not na(src)
sma_validCount +=1
sma_sum += nz(src, 0.0)
array.set(sma_buffer, sma_head, src)
sma_head := (sma_head + 1) % len
float movingAverage = na
if sma_validCount >= len or bar_index + 1 >= len
movingAverage := sma_sum / math.max(sma_validCount, 1)
if bar_index < len -1
movingAverage := sma_sum / math.max(bar_index + 1, 1)
float bias_result = na
if not na(movingAverage) and movingAverage != 0
bias_result := (src - movingAverage) / movingAverage
bias_result
// ---------- Main loop ----------
// Inputs
i_source = input.source(close, "Source")
i_length = input.int(20, "Length", minval=1)
// Calculation
biasValue = bias(i_source, i_length)
// Plot
plot(biasValue, "BIAS", color=color.yellow, linewidth=2)
Overview
Bias (BIAS) maintains a circular buffer and running sum so the average updates bar by bar, and it refuses a length of zero or less. The result is plotted as a single line in a separate pane. Source and lookback length are the only settings. It does not generate entries, exits, stops, or position sizing.
- Relative deviation from a simple moving average
- Configurable source and lookback length
- Circular buffer running-sum SMA
- Single-line plot in a separate pane
- Runtime error when length is not positive
Details
Published by
mihakralj on GitHub
Type
Indicator, Pine Script v6
Draws
Separate pane below the chart
Category
Oscillators & momentum, Moving averages
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 | 20 | 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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