Evaluations are stored from White's point of view so the graph has a fixed meaning; a loss is measured from the mover's, which is the only reading under which "you lost 3 pawns" makes sense for both colours.
Evaluations are stored from White's point of view so the graph has a fixed meaning; a loss is measured from the mover's, which is the only reading under which "you lost 3 pawns" makes sense for both colours.