Get Bollinger bands strategy Code That Actually Works

//@version=5
indicator("Bollinger Bands Strategy", shorttitle="BB Strategy", overlay=true)

// Input parameters for customization
bb_length = input.int(20, title="BB Length", minval=1)
bb_mult = input.float(2.0, title="BB StdDev Multiplier", minval=0.1, step=0.1)
src = input.source(close, title="Source")

// Additional inputs for strategy signals
show_squeeze = input.bool(true, title="Show Squeeze Detection")
squeeze_threshold = input.float(0.1, title="Squeeze Threshold %", minval=0.01, step=0.01)

// Enable/disable alerts
alert_long = input.bool(true, title="Alert on Long Signal")
alert_short = input.bool(true, title="Alert on Short Signal")
alert_squeeze = input.bool(true, title="Alert on Squeeze")

// Colors and styles
upper_color = input.color(color.blue, title="Upper Band Color")
lower_color = input.color(color.blue, title="Lower Band Color")
basis_color = input.color(color.orange, title="Basis Color")

// Bollinger Bands calculations
basis = ta.sma(src, bb_length)
dev = bb_mult * ta.stdev(src, bb_length)
upper = basis + dev
lower = basis - dev

// Squeeze calculation: low volatility when band width is narrow relative to basis
band_width = (upper - lower) / basis
squeeze = show_squeeze and band_width < squeeze_threshold

// Strategy signals: mean reversion on band touches
long_signal = ta.crossover(src, lower)
short_signal = ta.crossunder(src, upper)

// Plots
basis_plot = plot(basis, title="Basis", color=basis_color, linewidth=2)
upper_plot = plot(upper, title="Upper Band", color=upper_color)
lower_plot = plot(lower, title="Lower Band", color=lower_color)

// Background fill between bands
fill(upper_plot, lower_plot, color=color.new(color.blue, 90), title="BB Fill")

// Signal shapes
plotshape(series=long_signal, title="Long Signal", location=location.belowbar, color=color.green, style=shape.triangleup, size=size.small)
plotshape(series=short_signal, title="Short Signal", location=location.abovebar, color=color.red, style=shape.triangledown, size=size.small)

// Squeeze plot
bgcolor(squeeze ? color.new(color.yellow, 80) : na, title="Squeeze Background")

// Alert conditions
if alert_long
    alertcondition(long_signal, title="BB Long", message="{{ticker}} Bollinger Bands: Price crossed above lower band - LONG signal!")
if alert_short
    alertcondition(short_signal, title="BB Short", message="{{ticker}} Bollinger Bands: Price crossed below upper band - SHORT signal!")
if alert_squeeze
    alertcondition(squeeze, title="BB Squeeze", message="{{ticker}} Bollinger Bands Squeeze detected - Volatility incoming!")

// Table for quick stats (optional display)
var table info_table = table.new(position.top_right, 2, 3, bgcolor=color.white, border_width=1)
if barstate.islast
    table.cell(info_table, 0, 0, "BB Width", text_color=color.black)
    table.cell(info_table, 1, 0, str.tostring(band_width * 100, "#.##") + "%", text_color=color.black)
    table.cell(info_table, 0, 1, "Upper", text_color=color.black)
    table.cell(info_table, 1, 1, str.tostring(upper, "#.##"), text_color=color.black)
    table.cell(info_table, 0, 2, "Lower", text_color=color.black)
    table.cell(info_table, 1, 2, str.tostring(lower, "#.##"), text_color=color.black)