If I'm understanding the question right, you're trying to have the field that contains the value of either 0 or 1 return like a true/false statement?
If so I do an eval statement:
| eval value1 = case(value==1,"true","false")
Then chart based on value1.
If you're trying to only show events if a user has a 1 associated to it, I'd honestly just add:
NOT 0
Or,
value!="0" OR value="1"
Is that what you're looking for?
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