Support and Resistance with Targets

//@version=5
indicator("Support and Resistance with Targets", overlay=true)

// Parameters
length1 = input.int(147, minval=1, title="Support/Resistance Length 1")
length2 = input.int(258, minval=1, title="Support/Resistance Length 2")
length3 = input.int(369, minval=1, title="Support/Resistance Length 3")

// Calculate support and resistance for different lengths
var float support1 = na
var float resistance1 = na
var float support2 = na
var float resistance2 = na
var float support3 = na
var float resistance3 = na

support1 := ta.lowest(low, length1)
resistance1 := ta.highest(high, length1)

support2 := ta.lowest(low, length2)
resistance2 := ta.highest(high, length2)

support3 := ta.lowest(low, length3)
resistance3 := ta.highest(high, length3)

// Plot support and resistance as lines
plot(support1, color=color.green,  title="Support 1", style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)
plot(resistance1, color=color.red, title="Resistance 1", style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

plot(support2, color=color.green,  title="Support 2", style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)
plot(resistance2, color=color.red, title="Resistance 2", style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

plot(support3, color=color.green,  title="Support 3", style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)
plot(resistance3, color=color.red, title="Resistance 3", style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

// Calculate targets
smallTarget = (resistance1 - support1) * 0.382 + support1
mediumTarget = (resistance2 - support2) * 0.618 + support2
largeTarget = (resistance3 - support3) * 1 + support3

// Plot targets
plot(smallTarget, color=color.blue, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0, title="Small Target")
plot(mediumTarget, color=color.orange, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0, title="Medium Target")
plot(largeTarget, color=color.purple, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0, title="Large Target")