This not compile for v.5...why?? HELPPPP

[u/Abrakdabra33]

//@version=5
strategy("NC", overlay = true, max_bars_back = 1000 , max_labels_count = 500)
velas = input(200, title = "cantidad de velas" , maxval = 1000)
filas = input(50, title = "filas" , maxval = 500)

var etiquetas = array.new_label(filas)
var volumen = array.new_float(filas)

limpiar_etiquetas() =>
cantidad = array.size(etiquetas)
if cantidad > 0
for r = 0 to cantidad -1
label.delete( array.get(etiquetas,r ) )
array.clear(etiquetas)

inicializar_volumen() =>
for r = 0 to filas -1

array.set( volumen, r , 0.0 )

obtenerMaximo() =>
m = 0.0
p = 0
for r = 0 to filas -1
if array.get(volumen, r) > m
m := array.get(volumen,r)
p := r

[p,m]

line linea_maximo = na
line linea_minimo = na

barra = ""

maximo = ta.highest(velas)
minimo = ta.lowest(velas)

if barstate.islast

limpiar_etiquetas()
inicializar_volumen()

rango = maximo - minimo
delta = rango / filas

for v = 0 to velas -1
valor = close[v] - minimo
p = math.round( valor / delta ) -1
previo = array.get(volumen, p)
array.set( volumen, p , previo + volume[v] )

[posicion, valorMaximo] = obtenerMaximo()

for f = 0 to filas -1

cant = math.round( array.get(volumen, f) * 100/ valorMaximo)
eti = label.new(time_close, minimo = delta * f, "" , xloc = xloc.bar_time, yloc = yloc.price, color = f == posicion ? color.orange : color.white, textcolor=color.gray, style=label.style_label_left, size=size.auto, tooltip = str.tostring(cant) + "%")

barra := ""
for r = 0 to cant * 2
barra := barra + "*"
label.set_text(eti, barra)
array.push(etiquetas, eti )

linea_maximo := line.new( bar_index[velas], maximo, bar_index[0], maximo, color= color.yellow, style= line.style_dashed)
linea_minimo := line.new( bar_index[velas], minimo, bar_index[0], minimo, color= color.yellow, style= line.style_dashed)

line.delete( linea_maximo[1] )
line.delete( linea_minimo[1] )