Trinket Macro Help

So I have a healing trinket and I want to set up a macro for it. I have one for spells but I never used a macro for a trinket before. Asked google and this is what the mighty google said

#showtooltip
/cast [@mouseover,help] [help,nodead] [@targettarget,help,nodead] [@player] 13

Consecrated Chalice is the trinket

The macro wants to work when I use it I can see the button highlighting like I am pressing it. But it doesn’t actually go off unless I target the person and use it without a macro

Any help would be greatly appreciated

Change /cast to /use. Item slots are one of the cases where the difference tends to matter.

#showtooltip
/use [@mouseover,help,nodead] [help] [@targettarget,help,nodead] [@player] 13