how do i two attack with a greatsword on torrent?

[Entiecrafter]

ive seen it wehre sometimes ill bring the sword down then up. when usually it just goes down but i cant it out. i double tap and it just repeats the animation.

[original shyster]

Hold the strong attack.

[Theta]

its light or heavy attacks on the horse. r1 or r2 or kbm equivalent

[Theta]

l1 l2 are opposite side

[Amica]

hold strong atk for right side attack
hold weapon skill atk for do same thing but in left side