Mmdrza Bolinger Meta (Pine Script) for tradingview Strategy Auto Class Entry

Mmdrza_Bolinger_Meta_v0.1.0.pine

//@version=5
strategy(shorttitle="MMDRZA Bollinger Meta 0.1.0", title="Mmdrza - Bollinger Bands Strategy with New Algorithm for any chart", overlay=true, commission_type=strategy.commission.percent, commission_value=0.1, slippage=0, default_qty_type=strategy.percent_of_equity, default_qty_value=100)

// Inputs
length = input.int(20, minval=1, title="Length")
maType = input.string("SMA", "Basis MA Type", options = ["SMA", "EMA", "SMMA (RMA)", "WMA", "VWMA"])
src = input(close, title="Source")
mult = input.float(2.0, minval=0.001, maxval=50, title="StdDev")
offset = input.int(0, "Offset", minval = -500, maxval = 500)

// Date Range Filter
startDate = input.time(title="Start Date", defval=timestamp("2018-01-01"), confirm=false)
endDate = input.time(title="End Date", defval=timestamp("2069-12-31"), confirm=false)
timeAllowed = time >= startDate and time <= endDate

// MA Type Selector
ma(source, length, _type) =>
    switch _type
        "SMA" => ta.sma(source, length)
        "EMA" => ta.ema(source, length)
        "SMMA (RMA)" => ta.rma(source, length)
        "WMA" => ta.wma(source, length)
        "VWMA" => ta.vwma(source, length)

// Calculations
basis = ma(src, length, maType)
dev = mult * ta.stdev(src, length)
upper = basis + dev
lower = basis - dev

// Preserve Indicator Plots
plot(basis, "Basis", color=color.rgb(194, 193, 192, 21), offset=offset)
p1 = plot(upper, "Upper", color=color.rgb(27, 202, 71, 38), offset=offset)
p2 = plot(lower, "Lower", color=color.rgb(172, 19, 19, 25), offset=offset)
fill(p1, p2, title="Background", color=color.rgb(233, 233, 233, 95))

// Strategy Logic
enterLong = ta.crossover(close, lower) and timeAllowed // Modified: Price crosses above lower band
exitLong = ta.crossunder(close, lower) and timeAllowed // Exit when price crosses back below lower band

if enterLong
    strategy.entry("Long", strategy.long)
if exitLong
    strategy.close("Long")

Screen Chart.md