It would be nice if we enter any clan page and see who is online.
It's useful, for example when we want to make a clan war, or just play with our clan members.
It could be just + char before (or after) the clan member nick at the clan main page.
What do you think?

It is one click away. Much faster to have a plus or a minus symbol for online and offline next to the members name. :O

Sure I guess.

One click (to the clan button at the top of the page) instead of clicking everyone profiles or checking threads to see this + sign.

iirc the previous clan system used to have the username with the + and - before them
but yeah
why not
but
but
u could add them all as your contacts
and see who is active there
here is your solution ^
but it is not good
so yea supported