Documentation for macros?

“values”:[ {“id”:“value”,“message”:{“deviceId”:1,“type”:“cc7”,“parameterNumber”:1,“min”:0,“max”:127 },“min”:0,“max”:127} ]},

I have been playing with the macros and so far so good.
max and min values work but I cannot inverse them.
I am trying to make that when one parameter decreases that another one decreases but it does not work with min 127 and max 0.
Is there a way to do this?

It is not easy to come with good macros so a lot of experimentation is required.
I am trying to make a sort of performance page.
So far increasing both fx dry/ wet and env release or both the env release of vca and vcf seem cool.