diff --git a/crates/fidc-core/src/platform_expr_strategy.rs b/crates/fidc-core/src/platform_expr_strategy.rs
index c910f15..c96325a 100644
--- a/crates/fidc-core/src/platform_expr_strategy.rs
+++ b/crates/fidc-core/src/platform_expr_strategy.rs
@@ -4415,8 +4415,10 @@ impl PlatformExprStrategy {
         let include_day_factors = normalized_identifiers.contains("day_factors")
             || normalized_identifiers.contains("day_factor")
             || prelude_identifiers.contains("day_factors");
-        let include_factors_map =
-            normalized_identifiers.contains("factors") || normalized_identifiers.contains("factor");
+        let include_factors_map = normalized_identifiers.contains("factors")
+            || normalized_identifiers.contains("factor")
+            || prelude_identifiers.contains("factors")
+            || prelude_identifiers.contains("factor");
         let include_process_event_counts = include_day_factors
             || normalized_identifiers.contains("process_event_counts")
             || prelude_identifiers.contains("process_event_counts");
@@ -4430,10 +4432,14 @@ impl PlatformExprStrategy {
             include_factors_map,
             include_process_event_counts,
         );
+        let expanded_prelude =
+            self.expand_runtime_helpers(ctx, day, stock, &self.normalized_prelude, &mut scope)?;
         let expanded_expr =
             self.expand_runtime_helpers(ctx, day, stock, &normalized_expr, &mut scope)?;
         if let Some(item) = stock {
-            for identifier in Self::extract_identifier_candidates(&expanded_expr) {
+            let mut expanded_identifiers = Self::extract_identifier_candidates(&expanded_prelude);
+            expanded_identifiers.extend(Self::extract_identifier_candidates(&expanded_expr));
+            for identifier in expanded_identifiers {
                 if Self::is_reserved_scope_name(identifier.as_str())
                     || self.prelude_declared_identifiers.contains(&identifier)
                     || (!self.stock_extra_factor_identifiers.contains(&identifier)
@@ -4456,8 +4462,8 @@ impl PlatformExprStrategy {
             }
         }
         let mut script_parts = Vec::with_capacity(2);
-        if !self.normalized_prelude.trim().is_empty() {
-            script_parts.push(self.normalized_prelude.as_str());
+        if !expanded_prelude.trim().is_empty() {
+            script_parts.push(expanded_prelude.as_str());
         }
         script_parts.push(expanded_expr.as_str());
         let script = script_parts.join("\n");
@@ -21639,7 +21645,11 @@ mod tests {
         cfg.rotation_enabled = false;
         cfg.benchmark_short_ma_days = 1;
         cfg.benchmark_long_ma_days = 1;
-        cfg.prelude = "let blackout = trade_date >= \"2025-01-06\";".to_string();
+        cfg.prelude = concat!(
+            "let signal_current_ma = rolling_mean_current(\"signal_close\", 2);",
+            " let blackout = trade_date >= \"2025-01-06\";"
+        )
+        .to_string();
         cfg.explicit_actions = vec![PlatformTradeAction::Order {
             kind: PlatformExplicitOrderKind::Value,
             symbol: "000001.SZ".to_string(),
@@ -21663,6 +21673,7 @@ mod tests {
                     " && rolling_zscore(\"close\", 2) > 0.9",
                     " && pct_change(\"close\", 1) > 0.09",
                     " && factor_value(\"mixed_factor\") == 7.0",
+                    " && signal_current_ma == 11.7",
                     " && trade_date == \"2025-01-06\"",
                     " && blackout"
                 )