Message on default parameters with int or double values[Code help]

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I'm developing some tools that requires by default to have a 0 value so the trader can customize them but I'd like to know if there's a way to set on a double value a default message like "Input here the TP value" or something like that?
 
Fernando Jose Velasco Borea:
I'm developing some tools that requires by default to have a 0 value so the trader can customize them but I'd like to know if there's a way to set on a double value a default message like "Input here the TP value" or something like that?
input double TPValue = 0; // input here TP value
 
Mohamad Zulhairi Baba:
// input here TP value

That would change the variable name but the input field would still show 0

 
Fernando Jose Velasco Borea:

That would change the variable name but the input field would still show 0

Can you show example what are looking for?
 
Fernando Jose Velasco Borea:
I'm developing some tools that requires by default to have a 0 value so the trader can customize them but I'd like to know if there's a way to set on a double value a default message like "Input here the TP value" or something like that?
Possible only if you use a string parameter and convert to a double later.
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