Macro to Decrease Initiative

In my games I have all participants initiative counts decrease over time and allow players to seize initiative and reroll to move up. I currently track this using a macro in a separate spreadsheet, but I'm wondering if this would be easy to integrate into the Roll20 initiative tracker instead. I don't know much about macros in Roll20 but if it's feasible to have a macro that can simply subtract two from everyone's initiative count when I run it, I would greatly appreciate it!

If you want something that is done individually by token so that each player could use a macro to reduce their initiative on the tracker, then you could use can set up something like this: &{template:default} {{name=@{selected|token_name} init change}} {{Reduced by=[[2 &tracker:-]]}} If you want to be able to do that with a group of tokens at a time, then I expect it is possible with the Group Initiative api script.  If you have it installed (or once you do), check out the help handout that it creates for the adjust or adjust-current commands.  I haven't used it in that way, but those look like they would do what you need.