[amibroker] Price Channel and/or Donchian Channel

[electricwally77]

In the charts layout window under the "Charts" tab and then under the
"Indicators" Folder, I'm trying to "Drag and Drop" an indicator called
"Price Channel" or "Donchian Channel" with a 60 day period but I don't
see this basic indicator listed. Do I have to somehow code it into the
"Formula Editor" or is the indicator hidden somewhere else? Thank you
for your time.