UML state diagram for N number of approvals

I am writing my first state diagram for an approvals matrix and I am stuck. An Order in our system will go through a number of states and transitions for approval:

States

Start (state)
(submit() transition)
Awaiting Approval (state)
(approve() transition)
Awaiting Approval (state)
(approve() transition)
...
Live (state)

My problem is that the awaiting approval states will only transition to Live state when N number of approve() events, for each order, are received (an approval from one user will trigger a notification for approval from another user).

Should I add a decision point after the Awaiting Approval state that does a self transition back to Awaiting Approval OR progresses to Live state based on a count of approvals (is that allowed? Or am I missing something?)

Any help would be appreciated. Most state diagrams I look at are based on a set number of approvals, not a variable list.

Solution

You will add a guard:

The approval trigger has a behavior inc approval count. Now the guard [approval count > N] will pass only if the counter is great enough.