Macro to cast Crash Lightning if it's off cool down, but Stormstrike otherwise?

[Kragwulf-moon-guard]

I thought the following would work:

#showtooltip
/cast Crash Lightning; Stormstrike

But it ends up just casting Crash Lightning and then hitting it again does nothing.

[Battlecruisr-kiljaeden]

@Adreaver-undermine

3. Macros - What can they not do?

Macros cannot make smart decisions for you. They can’t cast spells based on cooldown, or check if a buff is active, or magically fit all your abilities onto one button.

[Elvenbane-veknilash (Elvenbane)]

Did you maybe mean to use a /castsequence instead?