Grid Bot Bollinger Bands [psyll]: 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

60 lines of Pine Script v6 from plugins/Grid Bot [Grid range plugin] Bollinger Bands [psyll].pine, published under MIT. Keep the author's credit and licence lines when you reuse it.

Grid Bot [Grid range plugin] Bollinger Bands [psyll].pine

//@version=6
// Author: Psyll.com
// Email: info@psyll.com
// Website: https://psyll.com
// Copyright: Copyright © 2025 psyll.com. All rights reserved.

indicator('Grid Bot [Grid range plugin] Bollinger Bands [psyll]', overlay = false)
decimal_places = 0
tick_size = syminfo.mintick
while tick_size < 1
    tick_size := tick_size * 10
    decimal_places := decimal_places + 1
    decimal_places
settings_group = 'Settings #################################################'
length = input.int(20, title = 'Length ', minval = 1, group = settings_group, display = display.none)
src = input(close, title = 'Source', group = settings_group, display = display.none)
mult = input.float(2.0, minval = 0.001, maxval = 50, title = 'StdDev', group = settings_group, display = display.none)
offset = input.float(1, 'Offset', group = settings_group, display = display.none)
smooth = input.int(1, 'Smoothness', minval = 1, group = settings_group, display = display.none)
width_min = input.float(0, 'Min width', group = settings_group, display = display.none)
width_max = input.float(99999, 'Max width', group = settings_group, display = display.none)
width_min_half = width_min / 2
width_max_half = width_max / 2
tf_group = 'Timeframe ###############################################'
tf_confirmation_wait = input.bool(defval = true, title = 'Wait for confirm', group = tf_group, inline = tf_group, display = display.none)
tf_no_repaint_security = input.bool(defval = true, title = 'No repaint', group = tf_group, inline = tf_group, display = display.none)
tf_barmerge_lookahead = input.bool(defval = false, title = 'Lookahead', group = tf_group, inline = tf_group, display = display.none)
tf_barmerge_gaps = input.bool(defval = false, title = 'Gaps', group = tf_group, inline = tf_group, display = display.none)
tf_type = input.string(title = 'Type', options = ['Static', 'Custom'], defval = 'Static', group = tf_group, display = display.none)
tf_static = input.timeframe(defval = '', title = 'Static', group = tf_group, display = display.none)
tf_custom = str.tostring(input.int(1, 'Custom', group = tf_group, display = display.none))
tf_type_value = switch tf_type
    'Static' => tf_static
    'Custom' => tf_custom
tf_security(source) =>
    request.security(syminfo.tickerid, tf_type_value, tf_no_repaint_security ? source[barstate.isrealtime ? 1 : 0] : source, gaps = tf_barmerge_gaps ? barmerge.gaps_on : barmerge.gaps_off, lookahead = tf_barmerge_lookahead ? barmerge.lookahead_on : barmerge.lookahead_off)[tf_no_repaint_security ? barstate.isrealtime ? 0 : 1 : 0]
display_group = 'Display ##################################################'
price_color = input.color(color.black, 'Candles color', display = display.none, group = display_group)
plotcandle(open, high, low, close, color = price_color, bordercolor = price_color, wickcolor = price_color, display = display.pane)
basis = tf_security(ta.sma(src, length))
dev = mult * tf_security(ta.stdev(src, length))
upper = basis + dev
lower = basis - dev
grid_high = upper + offset
grid_low = lower - offset
grid_middle = (grid_high + grid_low) / 2
if grid_high - grid_low < width_min
    grid_high := grid_middle + width_min_half
    grid_low := grid_middle - width_min_half
    grid_low
if grid_high - grid_low > width_max
    grid_high := grid_middle - width_max_half
    grid_low := grid_middle + width_max_half
    grid_low
grid_high := ta.sma(grid_high, smooth)
grid_low := ta.sma(grid_low, smooth)
grid_middle := ta.sma(grid_middle, smooth)
plot(grid_high, 'High', color.green, display = display.all)
plot(grid_middle, 'Middle', color.silver, display = display.pane)
plot(grid_low, 'Low', color.red, display = display.all)

Overview

Grid Bot Bollinger Bands [psyll] computes moving average basis lines and standard deviation bands, applying user-defined offsets, smoothing, and minimum or maximum width limits. Drawn in a separate pane along with mini price candles, it serves as a modular grid range plugin rather than executing trades directly. Key settings adjust the calculation length, standard deviation multiplier, width constraints, smoothing, and multi-timeframe request parameters, including optional lookahead and no-repaint security controls.

Bollinger Bands grid range calculation
Minimum and maximum width constraints
Configurable multi-timeframe security requests
Smoothing moving averages for boundaries
Separate pane candlestick rendering

Details

Published by

cullyk on GitHub

Code credit

Copyright, as written in the script's header

Type

Indicator, Pine Script v6

Draws

Separate pane below the chart

Markets

Any symbol

Timeframes

Any timeframe

Risk Notes

Reads higher-timeframe data with lookahead on, so the history can show signals that were not there in real time

File

plugins/Grid Bot [Grid range plugin] Bollinger Bands [psyll].pine

Repository

github.com/cullyk/Grid-Bot. See its other scripts in the library

Settings

The inputs you can change from the gear icon on the chart. Defaults are the author's.

Setting	Type	Default	Variable
Length	`int`	`20`	`length`
Source	`source`	`close`	`src`
StdDev	`float`	`2.0`	`mult`
Offset	`float`	`1`	`offset`
Smoothness	`int`	`1`	`smooth`
Min width	`float`	`0`	`width_min`
Max width	`float`	`99999`	`width_max`
Wait for confirm	`bool`	`true`	`tf_confirmation_wait`
No repaint	`bool`	`true`	`tf_no_repaint_security`
Lookahead	`bool`	`false`	`tf_barmerge_lookahead`
Gaps	`bool`	`false`	`tf_barmerge_gaps`
Type	`string`	`Static`	`tf_type`

Show all 15 settings

Setting	Type	Default	Variable
Static	`timeframe`		`tf_static`
Custom	`int`	`1`	`Custom`
Candles color	`color`	`color.black`	`price_color`

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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