Pinescript to Amibroker AFL Conversion

convert the below Pinescript code to Amibroker AFL coding langauge.

//@version=5
indicator("Andean Oscillator")
//------------------------------------------------------------------------------
//Settings
//-----------------------------------------------------------------------------{
length = input(50)

sig_length = input(9,'Signal Length')

//-----------------------------------------------------------------------------}
//Exponential Envelopes
//-----------------------------------------------------------------------------{
var alpha = 2/(length+1)

var up1 = 0.,var up2 = 0.
var dn1 = 0.,var dn2 = 0.

C = close
O = open

up1 := nz(math.max(C, O, up1[1] - (up1[1] - C) * alpha), C)
up2 := nz(math.max(C * C, O * O, up2[1] - (up2[1] - C * C) * alpha), C * C)

dn1 := nz(math.min(C, O, dn1[1] + (C - dn1[1]) * alpha), C)
dn2 := nz(math.min(C * C, O * O, dn2[1] + (C * C - dn2[1]) * alpha), C * C)

//Components
bull = math.sqrt(dn2 - dn1 * dn1)
bear = math.sqrt(up2 - up1 * up1)

signal = ta.ema(math.max(bull, bear), sig_length)