Gann medians MA targets with Vol weighted

//@version=5
indicator("Gaann medians MA targets", overlay=true, max_bars_back=500, max_lines_count=500, max_labels_count=500)

// Inputs
method1 = input.string('Median', options=['EMA', 'Median', 'SMA'])
length1 = input(56)
mult1 = input.int(1, minval=0, maxval=1)

method2 = input.string('Median', options=['EMA', 'Median', 'SMA'])
length2 = input(100)
mult2 = input.int(1, minval=0, maxval=1)

method3 = input.string('Median', options=['EMA', 'Median', 'SMA'])
length3 = input(200)
mult3 = input.int(1, minval=0, maxval=1)

// Calculation of medians
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

// Calculation of volume
volLength = input.int(20, minval=1, title='Volume Length')
volMultiplier = input.float(1.0, title='Volume Multiplier')

volAvg = ta.sma(volume, volLength) * volMultiplier

// Calculation of signals and liquidity levels
e1 = Avg(c1, length1, method1)
f1 = Avg(d1, length1, method1)
gx1 = 0
cross_1 = ta.cross(close, f1)
gx1 := ta.cross(close, e1) ? 1 : cross_1 ? 0 : nz(gx1[1])

e2 = Avg(c2, length2, method2)
f2 = Avg(d2, length2, method2)
gx2 = 0
cross_2 = ta.cross(close, f2)
gx2 := ta.cross(close, e2) ? 1 : cross_2 ? 0 : nz(gx2[1])

e3 = Avg(c3, length3, method3)
f3 = Avg(d3, length3, method3)
gx3 = 0
cross_3 = ta.cross(close, f3)
gx3 := ta.cross(close, e3) ? 1 : cross_3 ? 0 : nz(gx3[1])

// Calculation of liquidity levels with volume
hilo1 = gx1 * f1 + (1 - gx1) * e1
css1 = gx1 == 1 ? color.green : color.red
plot(hilo1, color=css1, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

hilo2 = gx2 * f2 + (1 - gx2) * e2
css2 = gx2 == 1 ? color.green : color.red
plot(hilo2, color=css2, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)

hilo3 = gx3 * f3 + (1 - gx3) * e3
css3 = gx3 == 1 ? color.green : color.red
plot(hilo3, color=css3, style=plot.style_line, show_last=1, linewidth=1, trackprice=true, transp=0)


//end of the code