Hi, I am using the multidensity package. Here's what I've tried:

Code:
sysuse auto, clear
multidensity gen price, by(foreign)
su _density1, meanonly
multidensity super, recast(area) opt1(lcolor(orange) color(orange%40) xline(`r(mean)') opt2(lcolor(blue) color(blue%40)) title("Price (USD)")
But the line does not appear. I'm really lost as to why this occurs. I'd like to add mean and median lines to my kdensity plots for each density.