Average Dollar Volume

This is average dollar volume ADV meaning:
Value of shares traded in a day in dollars averaged X bars back.

FX rate to usd (1 if price in USD) * Average price X bars back * Average Volume X bars back.
X is the value you can choose.
You can choose to only display 1 of 2 X(lengths).
As standard, first length is 200 and second is 20. so basically