Add a 20 bar exponential moving average, and a 10 bar exponential moving average, of the typical price (calculated as (High + Low + Close) / 3)), which is also known as the HLC average.
From Adam Milton, former About.com Guide
Add a 20 bar exponential moving average, and a 10 bar exponential moving average, of the typical price (calculated as (High + Low + Close) / 3)), which is also known as the HLC average.