Double HullMA Cross v2

study(title="Double HullMA Cross", overlay=true)
n=input(title="period",type=integer,defval=7)

n2ma=2*wma(close,round(n/2))
nma=wma(close,n)
diff=n2ma-nma
sqn=round(sqrt(n))

n2ma1=2*wma(close[1],round(n/2))
nma1=wma(close[1],n)
diff1=n2ma1-nma1
sqn1=round(sqrt(n))

n1=wma(diff,sqn)
n2=wma(diff1,sqn)
c=n1>n2?lime:red
plot(n1,color=c, linewidth = 1)
plot(n2,color=c, linewidth = 1)
plot(cross(n1, n2) ? n1 : na, style = cross, color = c, linewidth = 4)