BFA is the stats that you see on another players profile.
You know how a Guild Hansel has roughly 700k spies? Well, let's say he isn't build complete on highlands yet and has (I know it can't be but assuming) exactly 500,000 spies. These are the stats his owner gets (BFA) as well how we all judge another players strength.
So, go to your profile. You see the long white numbers at the top or near it? Those are your raw stats. They are also 50x bigger than your BFA, or the stats that you judge strength from.
So, with 500,000 stats, it is really 25,000,000 raw stats.
But that is for that player only. The stats you see in another players profile (the BFA, what you use to judge strength) are added to the owners raw stats. So, if a player with 500,000 stats owned another player with 500,000 stats as well, they would not have 25,000,000 raw stats but really they'd have 25,500,000 raw stats while they owned that ally. Except, that extra bit is static, like a tower.
You can work out another players BFA if you can see all their allies.
Do it like (stats)*50 (plus) <ally bonus> / 50
That's their stats at full troops. Keep the stats for the player separate to BFE and BFA so you know what's static and what isn't