Get Sma indicator Code That Actually Works

//@version=5
indicator("Professional SMA Indicator", shorttitle="SMA Pro", overlay=true)

// Input parameters for customization
smaLength = input.int(20, title="SMA Length", minval=1, maxval=500)
src = input.source(close, title="Source")
showSignals = input.bool(true, title="Show Buy/Sell Signals")
useAlerts = input.bool(true, title="Enable Alerts")
maColor = input.color(color.blue, title="SMA Color")
signalSize = input.string("Small", title="Signal Size", options=["Tiny", "Small", "Normal"])

// Map signal size
sigSize = signalSize == "Tiny" ? size.tiny : signalSize == "Small" ? size.small : size.normal

// Calculate SMA
smaValue = ta.sma(src, smaLength)

// Trend direction
trendUp = src > smaValue
trendDown = src < smaValue

// Signal conditions: crossovers
bullCross = ta.crossover(src, smaValue)
bearCross = ta.crossunder(src, smaValue)

// Plot the SMA line
plot(smaValue, title="SMA", color=maColor, linewidth=2)

// Plot buy/sell signals
plotshape(showSignals and bullCross, title="Buy Signal", style=shape.labelup, location=location.belowbar, color=color.new(color.green, 0), textcolor=color.white, text="BUY", size=sigSize)
plotshape(showSignals and bearCross, title="Sell Signal", style=shape.labeldown, location=location.abovebar, color=color.new(color.red, 0), textcolor=color.white, text="SELL", size=sigSize)

// Background coloring for trend
bgcolor(trendUp ? color.new(color.green, 95) : trendDown ? color.new(color.red, 95) : na, title="Trend Background")

// Fill between price and SMA for visual clarity
fill(plot(src), plot(smaValue), color=trendUp ? color.new(color.green, 90) : color.new(color.red, 90), title="Price-SMA Fill")

// Alerts for mobile notifications
alertcondition(useAlerts and bullCross, title="SMA Bull Cross", message="{{ticker}} Price crossed above SMA({{plot_0}}) - BUY signal!")
alertcondition(useAlerts and bearCross, title="SMA Bear Cross", message="{{ticker}} Price crossed below SMA({{plot_0}}) - SELL signal!")

// Real-time info table
if barstate.islast
    var infoTable = table.new(position.top_right, 2, 4, bgcolor=color.new(color.white, 80), border_width=1, border_color=color.gray)
    table.cell(infoTable, 0, 0, "SMA Value", text_color=color.black, text_size=size.small)
    table.cell(infoTable, 1, 0, str.tostring(smaValue, "#.####"), text_color=maColor, text_size=size.small)
    table.cell(infoTable, 0, 1, "Trend", text_color=color.black, text_size=size.small)
    table.cell(infoTable, 1, 1, trendUp ? "BULLISH" : "BEARISH", text_color=trendUp ? color.green : color.red, text_size=size.small)
    table.cell(infoTable, 0, 2, "Length", text_color=color.black, text_size=size.small)
    table.cell(infoTable, 1, 2, str.tostring(smaLength), text_color=color.black, text_size=size.small)
    table.cell(infoTable, 0, 3, "Source", text_color=color.black, text_size=size.small)
    table.cell(infoTable, 1, 3, src == close ? "Close" : "HL2", text_color=color.black, text_size=size.small)