diff --git a/scripts/run_walk_forward_backtest.py b/scripts/run_walk_forward_backtest.py
index ff69b60..ed8eddf 100644
--- a/scripts/run_walk_forward_backtest.py
+++ b/scripts/run_walk_forward_backtest.py
@@ -31,6 +31,8 @@
 )
 DEFAULT_STORE_ROOT = Path("/tmp/crypto_wf_store")
 DRIFT_BASELINE_HORIZON_DAYS = 126
+CRYPTO_PERIODS_PER_YEAR = 365.25
+CRYPTO_CALENDAR_ID = "CRYPTO_NATURAL_DAY"
 
 PROFILE_DEFAULTS: dict[str, dict[str, Any]] = {
     PROFILE_NAME: {"min_history_days": DEFAULT_MIN_HISTORY_DAYS, "top_n": 2, "rebalance_every": 7},
@@ -191,7 +193,12 @@ def _write_return_matrix(
 
 def _baseline_from_return_tail(full_result: Any, returns: pd.Series) -> Any:
     tail = returns.tail(DRIFT_BASELINE_HORIZON_DAYS)
-    metrics = compute_window_metrics(tail, window_days=DRIFT_BASELINE_HORIZON_DAYS)
+    metrics = compute_window_metrics(
+        tail,
+        window_days=DRIFT_BASELINE_HORIZON_DAYS,
+        periods_per_year=CRYPTO_PERIODS_PER_YEAR,
+        calendar_id=CRYPTO_CALENDAR_ID,
+    )
     max_drawdown = float(metrics.max_drawdown)
     cagr = float(metrics.cagr)
     return replace(
@@ -206,6 +213,8 @@ def _baseline_from_return_tail(full_result: Any, returns: pd.Series) -> Any:
         start_date=metrics.start_date,
         end_date=metrics.end_date,
         observation_count=metrics.observation_count,
+        periods_per_year=metrics.periods_per_year,
+        calendar_id=metrics.calendar_id,
     )
 
 
diff --git a/src/crypto_strategies/backtest/orchestrator_runner.py b/src/crypto_strategies/backtest/orchestrator_runner.py
index dffe697..4db08c3 100644
--- a/src/crypto_strategies/backtest/orchestrator_runner.py
+++ b/src/crypto_strategies/backtest/orchestrator_runner.py
@@ -24,6 +24,8 @@
 COMBO_DEFAULT_MIN_HISTORY_DAYS = 260
 SUPPORTED_PROFILES = frozenset({PROFILE_NAME, CRYPTO_EQUITY_COMBO_PROFILE})
 SYNTHETIC_PANEL_GENERATOR_VERSION = "crypto_live_pool_panel.v2"
+CRYPTO_PERIODS_PER_YEAR = 365.25
+CRYPTO_CALENDAR_ID = "CRYPTO_NATURAL_DAY"
 
 
 def _synthetic_digest_int(*parts: str) -> int:
@@ -144,6 +146,8 @@ def _metrics_to_result(
         source_script="crypto_strategies.backtest.orchestrator_runner",
         computed_at=datetime.now(timezone.utc).isoformat(),
         run_duration_seconds=run_duration_seconds,
+        periods_per_year=CRYPTO_PERIODS_PER_YEAR,
+        calendar_id=CRYPTO_CALENDAR_ID,
     )