fingerpicked?
I assume you mean apeggio? arpeggio?
see...I dont even know what I mean...

But the BASICS for it is...

If you are playing an A chord, you would pick the A string and then pick the last 3 or 4 strings in which ever way sounds nice. (also goes for C)

If you play an E or G chord, pluck the E string first.

D or F - D string.

I cant really think of which one for B right now!

I hope I have explained ok...