4th Finger Vibrato, Is something many people struggle with. Make sure that your hand is relaxed and that your pinkey is strong and independent enough (do 4th finger strengthening exercises if not). Train Your Fourth Finger Vibrato in 10 Steps , 1 Start SLOW Its important to train the CORRECT movement pattern. , I see too many violinists pick up tight, incorrect, or uncontrolled (or out Fourth Finger Vibrato Tips l Violin Tutorial Pinky Vibrato on the Violin