Cumulative Δχ² vs the reference
Σ2θ'≤2θ(δ²variant − δ²ref). Falling = winning, rising = losing, flat = doing nothing. The slope says where the change acted, which is what separates a correction that models physics from one that absorbs it. The endpoint is the whole χ² difference.
Nothing drawn yet: tick the variants to compare and press Run.
Weighted residual (yobs − ycalc)/σ
Same vertical scale for every variant, so smaller is literally better.
Observed and calculated
Statistics
Read the diagnostics below before believing a Rwp improvement. Some variants here cannot change Rwp by construction — capillary absorption is an exact reparameterisation of the scale and Biso — so the parameter columns are where their effect shows up.