| coin | Yes | Coin the evidence is scoped to; null means too few coin-level samples, so the numbers are strategy-wide. | |
| note | No | Verbatim upstream note on how populations and metrics relate; states that win rate and returns use completed outcomes only. | |
| query | Yes | The validated input echoed back, i.e. the signal_id you asked for. | |
| metrics | No | Measured over completed outcomes only (WIN + LOSS + TIME). Anything the source cannot compute is null — never fabricated. | |
| strategy | Yes | Strategy version the evidence is scoped to, e.g. 'momentum-breakout-v1'. | |
| ml_models | Yes | Machine-learning models used by this strategy and how far their own validation has come. | |
| checked_at | Yes | When we produced this answer (ISO 8601, UTC). The only ISO timestamp in the payload; every other timestamp is unix seconds. | |
| disclaimer | Yes | Our product boundary, verbatim in every paid advice response: market intelligence only, no execution, no custody, no position sizing, and opportunity_score is a heuristic rather than a calibrated win probability. | |
| populations | No | Disjoint counts over the window, reported apart from the metrics so selection effects stay visible. blocked and expired_without_entry are EXCLUDED from every metric denominator. | |
| window_days | No | Length of the measurement window in days. | |
| source_as_of | Yes | Unix seconds — freshness of the upstream advice system's answer. | |
| measured_since | No | Unix seconds — start of the measurement window. | |
| source_disclaimer | No | Verbatim disclaimer of the upstream advice system, passed through unedited. | |
| recommended_next_call | Yes | Machine-readable next step in the chain (scan → signal → validate → evidence → check), so you can follow the workflow without documentation. null means there is explicitly nothing useful to call now; next_check_after then says when to come back. | |
| strategy_evidence_status | No | How far out-of-sample validation has come. UNVALIDATED = no measured outcomes yet, EARLY_EVIDENCE = too few to lean on, VALIDATED = enough measured evidence, REJECTED = measured and found not to work. | |