This is my first time making tutorials so pardon me for glitches/boring speeches and non fluent english.

Easy steps :
Step 1 : Press B and move the left stick in any direction(left or right) you want. Make sure you just get it to halfway to the post.
Step 2 : while the player is moving towards the ball to take the penalty,press B again so he will stop in his run up.
Stem 3 : look at the movement of the keeper as soon as you press B for second time.
Step 4 : If keeper is shaky and looks moving in sideways,bring your penalty direction to the centre.
Step 5 : If keeper is just jumping up and down and is steady,try to just move your direction to the top corner.

Please practise this in arena as many times as you can. Please make sure you get used to the blue cursor movement of penalty direction.

I am open to suggestions and a like is appreciated.