mostUsersEverOnline in the template means that it's a template variable.
YOu can have a look at the top of the page if there's some assign statement with that variable, and see what context object it is derived from - or - it may be the context object itself
In this case
you should find a "context.put("mostUsersEverOnline" ..." statement within the forumaction class, where the context parameters for the forum action is being filled. Those context parameters are the template variables later on.
One thing about the substitution
testing may be issues with "cache" so that changes may not be visible right away. I have to admit, I didnt write substitutions on myself yet in jforum.
[originally posted on jforum.net by Sid]