We can reverse engineer it from real readings.
That would mean - we look at few readings we understand really well. All moving lines are clear, all that has happened we know well etc.
Then we look at the stars and we see how they reflect the events.
Done enough times and some links may start to emerge that may be fully valid if we can find in new cases as well.
As far as symbolic stars go I would recommend Annis bazi book when its out(no idea when, as we can see on the calculators). While it doesn't have info if the star is active or not, for most of them(only how its calculated) it has awesome info about the stars themselves. As some of them exist in Face Reading, or in Palm Reading etc.
And since many of them are the same names and calculations as in WWG, it could help understand them better. Its not publish yet in English,however, if it is we will write on the calculators and stuff.
For specifically WWG stars in English I don't know any source, other then what we already know here.
@firelink did use them if I remember,correctly, can ask there if still here.
In any case Reversing them from charts we already know seems to be good way to understand them, in my humble view.
