Actually, it is slightly easier than that. All you need to do is run right, then press up and then back to right at the right moment (just before your player makes contact with the ball to kick it ahead when running). Moving the stick down rather than up usually makes for another animation suhc as the 2-foot feint or some other variation of body feints.
I hate this system though. It is frustratingly hard to pull off consistently, and in tough situations where you might be running left and right to avoid players. in real-life it is easy to bodyfeint, just act like you are going to pull the ball away with your right foot, then miss wit hthat and pull it with the left one instead. No problems getting that one very time, whilst it in PES is extremely hard unless you are running in a straight line. This is one of those tricks they should shift to the right analog stick, perhaps in substitution for the shot feint which is pointless to have there since it is very easily performed with lob -> pass buttons anywhere on the pitch.
