How can I use "fill=EuroToUS" with attribute balance?

Summary:
How can I use "fill=EuroToUS" with attribute balance?

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Hi,

I am using attribute balance (Type: "Number" and Total: "Sum") but my number (value) uses comma as decimal separator and the amount that appears on attribute is wrong because this (obs: my browser is Portuguese language).

I tried to replace comma to point but it was not worked and the "fill" expression is not avaible for this .

Is there some way to resolve this issue?

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