In Steins;Gate there is much ado about the Divergence Number of the current world line. But if I am remembering correctly, the meter Kyouma made/carries/is given shows the difference between the current world line and the "previous" one—which I understood to be the one Okabe was in immediately before his last time jump.
Does the Divergence Number work relative to the last time jump–originating world line, or relative to the world line where it was constructed (the world line where SERN maintains a dystopia)?