The Fraction of Everything Index, or FOEI, is a way of measuring how much of "reality" a verse has. In other words, it is an existence index.
In FOEI, 0 means it contains nothing and 1 means it contains everything. But when we say it’s FOEI of (0,-1) this means that this thing have negative size and existing bellow the Archversal Protoverse.
Also, an FOEI of (0,1) means it contains something but not nothing, but an infinitely small fraction of reality.
For example:
Archversal Protoverse as FOEI of 0, since it contains Nothing
Archversal Universe has FOEI of (0,1) since it contains only infinitely small part of reality
Archversal Multiverse has FOEI of (0,1) since it still contains only a few things, even though it contains more than the Archversal universe.
Omniverse has an FOEI of 1, since it contains everything in that Reality.
There are some areas where it contains everything that exists AND more, like in The Secode, which has an FOEI of ω.
If it had an FOEI of 2, it would contain everything, as well as another quantity the same size of everything, sort of between existence and non-existence.
Transcendenten has an FOEI of 2, since it contains everything & More.