Folds that have finished and reported a winner.
Folds requested at submit.
OptionalinResolved in-sample share each fold optimized on.
OptionalparamMean normalized lattice distance between consecutive fold winners. Low is good: winners that stay in a tight band fold after fold are evidence the parameter means something, while winners that jump across the grid every time are the sweep re-fitting noise, and that backtest will not survive contact with live data. Absent is not zero — the field is omitted whenever the figure could not be computed (fewer than two folds finished, no stored grid to place winners on), because zero is itself a meaningful reading here and a placeholder would be indistinguishable from perfect stability.
One entry per completed fold, oldest first.
Present only on a sweep submitted with
walkForward, and present from acceptance onward — its presence, not its contents, is what identifies a walk-forward sweep.completedFoldsis 0 while the first fold is still running.