Hey Philippe
My understnading was that you extended your arms forward.
it is the case, you are striking from a one step strike range (you need one pass forward to it your oppoenent
i do extend my arm's forward from my right in a horizontal strike to my left (zwerch=horizotal short edge in my muddled brain), i do not
pass forward i
traverse(with a large=leap/step) to my right, there is much less power in a zwerch that is straight forward and it also doesn't set you for advantage, i try though most of the time unsuccessfuly to get off line, so that way when i strike if they counter they have to adjust first to my movement then counter, in this way they have to constantly fight at the range i want, and adjust themselve's for the range they want it also help's me to control the tempo of the fight.
My leap/step may be larger than most i am 6 foot and fairly light weight so that might be part of why it work's for me my step maybe unusualy large.
Jeff