Fibonacci Auto Buy/Sell Signals

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Ahmed - Quant-Edge Indicators
//@version=6
indicator("Fibonacci Auto Buy/Sell Signals", overlay=true)

// Define Fibonacci retracement and extension levels
retracementLevel1 = 0.236
retracementLevel2 = 0.382
retracementLevel3 = 0.5
retracementLevel4 = 0.618
extensionLevel1 = 1.618
extensionLevel2 = 2.618

// Define lookback periods for swing high/low
lookbackPeriodHigh = 50
lookbackPeriodLow = 50

// Calculate swing high and swing low for Fibonacci
swingHigh = ta.highest(high, lookbackPeriodHigh)
swingLow = ta.lowest(low, lookbackPeriodLow)

// Calculate Fibonacci retracement levels
fibRetrace1 = swingHigh - (swingHigh - swingLow) * retracementLevel1
fibRetrace2 = swingHigh - (swingHigh - swingLow) * retracementLevel2
fibRetrace3 = swingHigh - (swingHigh - swingLow) * retracementLevel3
fibRetrace4 = swingHigh - (swingHigh - swingLow) * retracementLevel4

// Calculate Fibonacci extension levels
fibExtension1 = swingLow + (swingHigh - swingLow) * extensionLevel1
fibExtension2 = swingLow + (swingHigh - swingLow) * extensionLevel2

// Plot Fibonacci retracement levels dynamically
var line fibLine1 = na
var line fibLine2 = na
var line fibLine3 = na
var line fibLine4 = na
var line extLine1 = na
var line extLine2 = na

if bar_index > 1
    line.delete(fibLine1)
    line.delete(fibLine2)
    line.delete(fibLine3)
    line.delete(fibLine4)
    line.delete(extLine1)
    line.delete(extLine2)

    fibLine1 := line.new(x1=bar_index[1], y1=fibRetrace1, x2=bar_index, y2=fibRetrace1, color=color.green, width=1, style=line.style_dotted)
    fibLine2 := line.new(x1=bar_index[1], y1=fibRetrace2, x2=bar_index, y2=fibRetrace2, color=color.green, width=1, style=line.style_dotted)
    fibLine3 := line.new(x1=bar_index[1], y1=fibRetrace3, x2=bar_index, y2=fibRetrace3, color=color.green, width=1, style=line.style_dotted)
    fibLine4 := line.new(x1=bar_index[1], y1=fibRetrace4, x2=bar_index, y2=fibRetrace4, color=color.green, width=1, style=line.style_dotted)

    extLine1 := line.new(x1=bar_index[1], y1=fibExtension1, x2=bar_index, y2=fibExtension1, color=color.red, width=1, style=line.style_dotted)
    extLine2 := line.new(x1=bar_index[1], y1=fibExtension2, x2=bar_index, y2=fibExtension2, color=color.red, width=1, style=line.style_dotted)

// Define buy and sell signals
buySignal = ta.crossover(close, fibRetrace4)
sellSignal = ta.crossunder(close, fibRetrace1)

// Plot buy and sell signals on the chart
plotshape(series=buySignal, title="Buy Signal", location=location.belowbar, color=color.new(color.green, 0), style=shape.labelup, text="BUY")
plotshape(series=sellSignal, title="Sell Signal", location=location.abovebar, color=color.new(color.red, 0), style=shape.labeldown, text="SELL")

// Targets and stop-loss
entryLevel = close
target1 = fibExtension1
target2 = fibExtension2
stopLoss = fibRetrace3

// Display targets and stop-loss on chart
label.new(bar_index, target1, str.tostring(target1, "#.##"), style=label.style_label_down, color=color.new(color.green, 80))
label.new(bar_index, target2, str.tostring(target2, "#.##"), style=label.style_label_down, color=color.new(color.green, 80))
label.new(bar_index, stopLoss, "Stop Loss: " + str.tostring(stopLoss, "#.##"), style=label.style_label_up, color=color.new(color.red, 80))

// Alerts
alertcondition(buySignal, "Buy Alert", "Buy signal triggered!")
alertcondition(sellSignal, "Sell Alert", "Sell signal triggered!")