Board Thread:General Discussion/@comment-31536324-20190117214835/@comment-31536324-20190128000318

For those wondering about the "fluctuations":

Omega Flowey Fight: Flowey absorbs the 6 Human SOULS, and regains SAVE, gaining more DT than Frisk. (An increase.)

God of Hyperdeath Fight: Asriel outright says, "Once I regain control of the timeline...I just want to reset everything." Directly implying that Frisk still has MORE DT than him, despite him gaining at least 7.5 or 8 SOULS worth of DT from reabsorbing the 6 Human SOULS and absorbing nearly every Monster SOUL in the Underground. An increase for Asriel, and a heavily implied increase for Frisk.

Frisk is also said by Asriel to lose DT everytime they die and their friends forget them by result of that. A clear indication of DT decreasing.