Pedal Tone Alternate Picking
a.k.a. neo-classical metal licks
Pedal tone licks are licks where you constantly alternate between a note (or melody) that stays the same and a note that changes. What this sometimes means for the right hand is that it must often skip some strings to do this, so it's pretty cool to practice it every so often! Since that often is now, here's the gist of it:
The melody will just be descending and ascending notes from the scale, and the pedal tone will be the highest note in the pattern. The melody will throughout this exercise always be played with downstrokes, the pedal tone will be always played with an upstroke.
Start off slow and clean!
D - Dorian
Here is the three note per string scale you'll be playing on! The pedal tone is colored blue!
As you can see - the melody is the whole scale descending from the high f (13th fret, 1st string) to the middle f (3rd string, 10th fret), and then ascending similarly. You can repeat it for as long as you want!