Morality is global. everyone has morals.
What is not global is that everyone accepts the same set of morals.
Indeed. But morality exists for a reason, and it must conform to that reason to be true to itself.
Take the stand your ground laws for example.
Is it moral or immoral to stand your ground?
It will depend on the consequences of both standing one's ground and failing to.
Which is to say, we would need more information and decide accordingly, perhaps on a case-by-case basis.
Is this to say that you believe most morals are objective?
They need to be, although apparently the very understanding of the concept has become too clouded already.
And if so, at what level?
At its most basic, at their reason for being. Morality is supposed to guide choices and decisions in order to favor and protect sustainable, acceptable circunstances for as many people as possible on an ongoing basis.
That goal, in and of itself, sharply restricts the behaviors and values that can possibly be considered moral. It just turns out that we do not often realize that, mainly because our lifestyles are fairly alienated from their moral consequences.
How would you measure this outside of appeal to popularity?
Admitedly, it is a considerable challenge, particularly at a time when the very understanding of the concept is all but lost for good. The main ways involve gauging the effects of decisions in compreehensive ways, listening to as many different perspectives as possible and purposefully introducing some random elements in order to minimize the effect of self-interest.