diff --git a/crates/fidc-core/src/broker.rs b/crates/fidc-core/src/broker.rs
index 1fb171b..27573f5 100644
--- a/crates/fidc-core/src/broker.rs
+++ b/crates/fidc-core/src/broker.rs
@@ -367,15 +367,16 @@ where
                 .get()
                 .or(self.intraday_execution_start_time)
                 .map(|start_time| date.and_time(start_time));
-            if let Some(price) = data
-                .execution_quotes_on(date, symbol)
-                .iter()
-                .filter(|quote| {
-                    start_cursor
-                        .map(|cursor| quote.timestamp >= cursor)
-                        .unwrap_or(true)
-                })
-                .find_map(|quote| {
+            if let Some(price) = self
+                .latest_known_quote_at_or_before(
+                    data.execution_quotes_on(date, symbol),
+                    start_cursor,
+                    snapshot,
+                    OrderSide::Buy,
+                    MatchingType::NextTickLast,
+                    false,
+                )
+                .and_then(|quote| {
                     (quote.last_price.is_finite() && quote.last_price > 0.0)
                         .then_some(quote.last_price)
                 })
@@ -399,22 +400,17 @@ where
             .get()
             .or(self.intraday_execution_start_time)
             .map(|start_time| date.and_time(start_time));
-        data.execution_quotes_on(date, symbol)
-            .iter()
-            .filter(|quote| {
-                start_cursor
-                    .map(|cursor| quote.timestamp >= cursor)
-                    .unwrap_or(true)
-            })
-            .find_map(|quote| {
-                self.select_quote_reference_price(
-                    snapshot,
-                    quote,
-                    side,
-                    self.matching_type_for_algo_request(None),
-                )
-            })
-            .unwrap_or_else(|| self.sizing_price(snapshot))
+        let matching_type = self.matching_type_for_algo_request(None);
+        self.latest_known_quote_at_or_before(
+            data.execution_quotes_on(date, symbol),
+            start_cursor,
+            snapshot,
+            side,
+            matching_type,
+            false,
+        )
+        .and_then(|quote| self.select_quote_reference_price(snapshot, quote, side, matching_type))
+        .unwrap_or_else(|| self.sizing_price(snapshot))
     }
 
     fn snapshot_execution_price(
@@ -1143,6 +1139,36 @@ where
         }
     }
 
+    fn latest_known_quote_at_or_before<'a>(
+        &self,
+        quotes: &'a [IntradayExecutionQuote],
+        cursor: Option<NaiveDateTime>,
+        snapshot: &crate::data::DailyMarketSnapshot,
+        side: OrderSide,
+        matching_type: MatchingType,
+        require_executable_liquidity: bool,
+    ) -> Option<&'a IntradayExecutionQuote> {
+        let Some(cursor) = cursor else {
+            return quotes.iter().find(|quote| {
+                self.select_quote_reference_price(snapshot, quote, side, matching_type)
+                    .is_some()
+                    && (!require_executable_liquidity
+                        || self.quote_has_executable_liquidity(quote, side, matching_type))
+            });
+        };
+        quotes
+            .iter()
+            .filter(|quote| {
+                quote.timestamp <= cursor
+                    && self
+                        .select_quote_reference_price(snapshot, quote, side, matching_type)
+                        .is_some()
+                    && (!require_executable_liquidity
+                        || self.quote_has_executable_liquidity(quote, side, matching_type))
+            })
+            .max_by_key(|quote| quote.timestamp)
+    }
+
     fn process_limit_shares(
         &self,
         date: NaiveDate,
@@ -4654,15 +4680,31 @@ where
         let quote_quantity_limited =
             self.quote_quantity_limited_for_window(matching_type, start_cursor, end_cursor);
         let lot = round_lot.max(1);
-        let eligible_quotes: Vec<&IntradayExecutionQuote> = quotes
-            .iter()
-            .filter(|quote| {
-                !start_cursor.is_some_and(|cursor| quote.timestamp < cursor)
-                    && !end_cursor.is_some_and(|cursor| quote.timestamp > cursor)
-                    && (!quote_quantity_limited
-                        || self.quote_has_executable_liquidity(quote, side, matching_type))
-            })
-            .collect();
+        let use_decision_time_quote = matching_type == MatchingType::NextTickLast
+            && start_cursor.is_some()
+            && end_cursor.is_none_or(|end| start_cursor.is_some_and(|start| end <= start));
+        let eligible_quotes: Vec<&IntradayExecutionQuote> = if use_decision_time_quote {
+            self.latest_known_quote_at_or_before(
+                quotes,
+                start_cursor,
+                snapshot,
+                side,
+                matching_type,
+                quote_quantity_limited,
+            )
+            .into_iter()
+            .collect()
+        } else {
+            quotes
+                .iter()
+                .filter(|quote| {
+                    !start_cursor.is_some_and(|cursor| quote.timestamp < cursor)
+                        && !end_cursor.is_some_and(|cursor| quote.timestamp > cursor)
+                        && (!quote_quantity_limited
+                            || self.quote_has_executable_liquidity(quote, side, matching_type))
+                })
+                .collect()
+        };
         let mut filled_qty = 0_u32;
         let mut gross_amount = 0.0_f64;
         let mut last_timestamp = None;
@@ -5077,7 +5119,7 @@ mod tests {
         snapshot.last_price = 10.0;
         snapshot.close = 10.0;
         let mut quote = limit_test_quote(11.0, 10.99, 11.01);
-        quote.timestamp = date.and_hms_opt(9, 34, 0).expect("valid timestamp");
+        quote.timestamp = date.and_hms_opt(9, 32, 58).expect("valid timestamp");
         let data = DataSet::from_components_with_actions_and_quotes(
             vec![limit_test_instrument()],
             vec![snapshot.clone()],
@@ -5100,6 +5142,51 @@ mod tests {
         );
     }
 
+    #[test]
+    fn next_tick_last_execution_uses_latest_quote_before_decision_time() {
+        let date = chrono::NaiveDate::from_ymd_opt(2025, 1, 2).expect("valid date");
+        let broker = BrokerSimulator::new_with_execution_price(
+            ChinaAShareCostModel::default(),
+            ChinaEquityRuleHooks,
+            PriceField::Last,
+        )
+        .with_volume_limit(false)
+        .with_liquidity_limit(false)
+        .with_inactive_limit(false);
+        let snapshot = limit_test_snapshot();
+        let mut quote = limit_test_quote(10.8, 10.79, 10.81);
+        quote.timestamp = date.and_hms_opt(9, 32, 58).expect("valid timestamp");
+        let quote_timestamp = quote.timestamp;
+        let decision_time = date.and_hms_opt(9, 33, 0).expect("valid timestamp");
+
+        let fill = broker
+            .select_execution_fill(
+                &snapshot,
+                &[quote],
+                OrderSide::Sell,
+                MatchingType::NextTickLast,
+                Some(decision_time),
+                Some(decision_time),
+                200,
+                100,
+                100,
+                100,
+                false,
+                None,
+                None,
+                None,
+            )
+            .expect("fill from latest known quote before decision time");
+
+        assert_eq!(fill.quantity, 200);
+        assert_eq!(fill.legs.len(), 1);
+        assert_eq!(fill.legs[0].price, 10.8);
+        assert_eq!(
+            fill.next_cursor,
+            quote_timestamp + chrono::Duration::seconds(1)
+        );
+    }
+
     #[test]
     fn instantaneous_twap_without_limits_does_not_cap_quote_quantity() {
         let broker = BrokerSimulator::new(ChinaAShareCostModel::default(), ChinaEquityRuleHooks)