Think of it as representitive of the chaos of a heated melee!
I typically use "by reverse mouse movement" as it seems more intuitive to me. Go to the duel server, pick up some rocks and a practice sword and practice. cRPG, like everything in this world gets easier as you do it more and more. Muscle memory and intuition must work together, and without the schema to draw reference from, you're missing one half of the equation.
If you ever see me on, feel free to call me out for some duels. I'm the Frail Old Man.