Using proficiency and cha modifier in a macro

Basically, the title. I can't find anything about using attribute modifiers or proficiency of my character in a macro. How do I do that? How do I say: Roll a d20 + proficiency + cha for example?

Here are several ways: This needs to be an Ability on the character: /roll 1d20 + @{PROFICIENCY_NAME} + @{cha} This can be a macro, and will work for any character linked to a token - you must select a token first: /roll 1d20 + @{selected|PROFICIENCY_NAME} + @{selected|cha} This will work anywhere - you need to supply the character name or token name: /roll 1d20 + @{NAME|PROFICIENCY_NAME} + @{NAME|cha} This uses an Inline Roll (the [[ ]]) to include a roll within text. I make a @{selected|PROFICIENCY_NAME} roll and roll [[1d20 + @{selected|PROFICIENCY_NAME} + @{selected|cha}]] If there are all CAPS, replace them with words with the appropriate for your character. The wiki does cover these options.

GiGs said: If there are all CAPS, replace them with words with the appropriate for your character. The wiki does cover these options. Just to clarify GiGs’ point: each character sheet (such as the D&D 5E by Roll20) have different attribute names. The 5E sheet uses ‘charisma_mod’ and ‘pb’ for those attributes. 

Good point - I assumed that since OP said cha, that was the correct attribute name. But that will vary with character sheet.