Newbie question about calculating attack bonuses in a macro

I'm creating a simple token action that will roll an attack for the selected token and then apply the correct attack bonus to it. It would look something like  /roll d20 + @{selected|strength_mod} +@{selected|xxxxxx}  <--  But which "Attributes and Abilities" number should I use to add to the strength bonus alone? 

What game are you playing and which character sheet are you using? Assuming D&D 5th edition using the D&D 5E by Roll20 sheet (adding Strength Modifier and Proficiency Bonus): /roll d20 + @{selected|strength_mod}[STR} +@{selected|pb}[Prof] Or you can reference the attack directly (assuming this is the first attack listed on the sheet: %{selected|repeating_attack_$0_attack} Or you may want to use my Statblock MacroMule approach so you don't have to create individual macros for each attack.

I'll try this out! Thanks!