Gann medians entry/exit targets

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © DarkPoolTrading
// Based on the Function Sine Wave Indicator by RicardoSantos

//@version=5
indicator(title='Gann medians entry/exit targets', precision=12)

method1 = input.string('Median', options=['EMA', 'Median', 'SMA'])
length1 = input(5)
mult1 = input.int(1, minval=0, maxval=1)

method2 = input.string('Median', options=['EMA', 'Median', 'SMA'])
length2 = input(7)
mult2 = input.int(1, minval=0, maxval=1)

method3 = input.string('Median', options=['EMA', 'Median', 'SMA'])
length3 = input(9)
mult3 = input.int(1, minval=0, maxval=1)
//----
Avg(x, length, method) =>
    sma_1 = ta.sma(x, length)
    ema_1 = ta.ema(x, length)
    percentile_linear_interpolation_1 = ta.percentile_linear_interpolation(x, length, 50)
    method == 'SMA' ? sma_1 : method == 'EMA' ? ema_1 : percentile_linear_interpolation_1
//----
a1 = ta.highest(length1) - math.max(close, open)
b1 = math.min(close, open) - ta.lowest(length1)
c1 = math.max(close, open) + a1 * mult1
d1 = math.min(close, open) - b1 * mult1

a2 = ta.highest(length2) - math.max(close, open)
b2 = math.min(close, open) - ta.lowest(length2)
c2 = math.max(close, open) + a2 * mult2
d2 = math.min(close, open) - b2 * mult2

a3 = ta.highest(length3) - math.max(close, open)
b3 = math.min(close, open) - ta.lowest(length3)
c3 = math.max(close, open) + a3 * mult3
d3 = math.min(close, open) - b3 * mult3
//----
e1 = Avg(c1, length1, method1)
f1 = Avg(d1, length1, method1)
g1 = 0
cross_1 = ta.cross(close, f1)
g1 := ta.cross(close, e1) ? 1 : cross_1 ? 0 : nz(g1[1])

e2 = Avg(c2, length2, method2)
f2 = Avg(d2, length2, method2)
g2 = 0
cross_2 = ta.cross(close, f2)
g2 := ta.cross(close, e2) ? 1 : cross_2 ? 0 : nz(g2[1])

e3 = Avg(c3, length3, method3)
f3 = Avg(d3, length3, method3)
g3 = 0
cross_3 = ta.cross(close, f3)
g3 := ta.cross(close, e3) ? 1 : cross_3 ? 0 : nz(g3[1])
//---
hilo1 = g1 * f1 + (1 - g1) * e1
css1 = g1 == 1 ? color.green : color.red
plot(hilo1, color=css1, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

hilo2 = g2 * f2 + (1 - g2) * e2
css2 = g2 == 1 ? color.green : color.red
plot(hilo2, color=css2, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

hilo3 = g3 * f3 + (1 - g3) * e3
css3 = g3 == 1 ? color.green : color.red
plot(hilo3, color=css3, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)


//end of this part