Macro help

[CripTiK]

I have a simple macro to cast my amplify curse when available then cast CoA. What I would like is the ability to hit the "alt" key and not cast amplify curse or vice versa...as in it would only cast amplify curse if I hit the "alt" key.

current macro:

/cast amplify curse
/stopcasting
/cast curse of agony

sorry if this seems trivial and thanks in advance for any help.