Price levels, hline

The hline annotation function renders a horizontal line at a given level. For example:

//@version=4
study(title="Chaikin Oscillator", shorttitle="Chaikin Osc")
short = input(3, minval=1)
long = input(10, minval=1)
osc = ema(accdist, short) - ema(accdist, long)
plot(osc, color=color.red)
hline(0, title="Zero", color=color.gray, linestyle=hline.style_dashed)

A number must be the first argument of hline. Values of series type are forbidden. It’s possible to create a few horizontal lines with the help of hline and fill the background between them with a translucent color using fill.