Need help making macro (if this one is even possible)

[Bertheigh-korialstrasz (Bertheigh)]

you could ask in the warrior or ui/macro sub forum and might get a better answer.

found this in the ui/macro forum:

@Monksrevenge-maelstrom

So interestingly enough if you change the macro:
#showtooltip
/castsequence reset=17 Charge, Charge, Shield Charge
it does work, ive messed around a few different iterations and its only once it hits shield charge that it stops the macro.