Build log09 Sept 20267 min
v0.15.0: 26 of Our 27 Backtests Were Identical — and the Optimiser Ranked Them Anyway
Our walk-forward offered three parameters to sweep. They were hard-coded — the settings of the example strategy, not of the strategy you loaded. Load a model that reads fifteen settings of its own and the optimiser sweeps two keys it never reads: 27 runs, 26 of them bit-identical, a "best" configuration chosen by floating-point rounding, and nothing on screen to say so. That is the worst failure mode a measuring instrument has — it returns a number. This is what we found, what we shipped to fix it, and the second thing v0.15.0 adds so a backtest can tell you when it is fooling itself.
Read it →updated September 2026