diff --git a/crates/fidc-core/src/platform_expr_strategy.rs b/crates/fidc-core/src/platform_expr_strategy.rs
index 085e260..9d21ef5 100644
--- a/crates/fidc-core/src/platform_expr_strategy.rs
+++ b/crates/fidc-core/src/platform_expr_strategy.rs
@@ -6881,20 +6881,15 @@ impl Strategy for PlatformExprStrategy {
                             });
                         }
                     }
-                    let spent = if filled_qty > 0 {
-                        (cash_before_buy - projected.cash()).max(0.0)
-                    } else {
-                        available_buy_cash
-                    };
-                    aiquant_available_cash = (aiquant_available_cash - spent).max(0.0);
-                    working_symbols.insert(symbol.clone());
-                    slot_working_symbols.insert(symbol.clone());
-                    pending_buy_value += available_buy_cash;
-                    filled_any = true;
                     if filled_qty > 0 {
+                        let spent = (cash_before_buy - projected.cash()).max(0.0);
+                        aiquant_available_cash = (aiquant_available_cash - spent).max(0.0);
+                        working_symbols.insert(symbol.clone());
+                        slot_working_symbols.insert(symbol.clone());
+                        pending_buy_value += available_buy_cash;
+                        filled_any = true;
                         break;
                     }
-                    break;
                 }
                 if !attempted_any || !filled_any {
                     break;
@@ -12586,6 +12581,165 @@ mod tests {
         )));
     }
 
+    #[test]
+    fn platform_daily_top_up_continues_after_unfilled_candidate() {
+        let prev_date = d(2025, 2, 2);
+        let date = d(2025, 2, 3);
+        let symbols = ["000001.SZ", "000002.SZ", "000003.SZ"];
+        let data = DataSet::from_components_with_actions_and_quotes(
+            symbols
+                .iter()
+                .map(|symbol| Instrument {
+                    symbol: (*symbol).to_string(),
+                    name: (*symbol).to_string(),
+                    board: "SZ".to_string(),
+                    round_lot: 100,
+                    listed_at: Some(d(2020, 1, 1)),
+                    delisted_at: None,
+                    status: "active".to_string(),
+                })
+                .collect(),
+            symbols
+                .iter()
+                .map(|symbol| DailyMarketSnapshot {
+                    date,
+                    symbol: (*symbol).to_string(),
+                    timestamp: Some("2025-02-03 10:18:00".to_string()),
+                    day_open: 10.0,
+                    open: 10.0,
+                    high: 10.5,
+                    low: 9.8,
+                    close: 10.0,
+                    last_price: 10.0,
+                    bid1: 10.0,
+                    ask1: 10.0,
+                    prev_close: 9.9,
+                    volume: 1_000_000,
+                    tick_volume: 10_000,
+                    bid1_volume: 2_000,
+                    ask1_volume: 2_000,
+                    trading_phase: Some("continuous".to_string()),
+                    paused: false,
+                    upper_limit: 11.0,
+                    lower_limit: 9.0,
+                    price_tick: 0.01,
+                })
+                .collect(),
+            symbols
+                .iter()
+                .map(|symbol| DailyFactorSnapshot {
+                    date,
+                    symbol: (*symbol).to_string(),
+                    market_cap_bn: match *symbol {
+                        "000003.SZ" => 5.0,
+                        "000002.SZ" => 6.0,
+                        _ => 7.0,
+                    },
+                    free_float_cap_bn: 10.0,
+                    pe_ttm: 8.0,
+                    turnover_ratio: Some(1.0),
+                    effective_turnover_ratio: Some(1.0),
+                    extra_factors: BTreeMap::new(),
+                })
+                .collect(),
+            symbols
+                .iter()
+                .map(|symbol| CandidateEligibility {
+                    date,
+                    symbol: (*symbol).to_string(),
+                    is_st: false,
+                    is_new_listing: false,
+                    is_paused: false,
+                    allow_buy: true,
+                    allow_sell: true,
+                    is_kcb: false,
+                    is_one_yuan: false,
+                })
+                .collect(),
+            vec![BenchmarkSnapshot {
+                date,
+                benchmark: "000852.SH".to_string(),
+                open: 1000.0,
+                close: 1002.0,
+                prev_close: 998.0,
+                volume: 1_000_000,
+            }],
+            Vec::new(),
+            vec![IntradayExecutionQuote {
+                date,
+                symbol: "000002.SZ".to_string(),
+                timestamp: date.and_hms_opt(10, 18, 0).expect("valid timestamp"),
+                last_price: 10.0,
+                bid1: 10.0,
+                ask1: 10.0,
+                bid1_volume: 10_000,
+                ask1_volume: 10_000,
+                volume_delta: 10_000,
+                amount_delta: 100_000.0,
+                trading_phase: Some("continuous".to_string()),
+            }],
+        )
+        .expect("dataset");
+
+        let mut portfolio = PortfolioState::new(10_000.0);
+        portfolio
+            .position_mut("000001.SZ")
+            .buy(prev_date, 1_000, 10.0);
+        let subscriptions = BTreeSet::new();
+        let ctx = StrategyContext {
+            execution_date: date,
+            decision_date: date,
+            decision_index: 2,
+            data: &data,
+            portfolio: &portfolio,
+            futures_account: None,
+            open_orders: &[],
+            dynamic_universe: None,
+            subscriptions: &subscriptions,
+            process_events: &[],
+            active_process_event: None,
+            active_datetime: None,
+            order_events: &[],
+            fills: &[],
+        };
+        let mut cfg = PlatformExprStrategyConfig::microcap_rotation();
+        cfg.signal_symbol = "000001.SZ".to_string();
+        cfg.refresh_rate = 99;
+        cfg.max_positions = 2;
+        cfg.benchmark_short_ma_days = 1;
+        cfg.benchmark_long_ma_days = 1;
+        cfg.market_cap_lower_expr = "0".to_string();
+        cfg.market_cap_upper_expr = "1000".to_string();
+        cfg.selection_limit_expr = "2".to_string();
+        cfg.stock_filter_expr = "close > 0".to_string();
+        cfg.daily_top_up_enabled = true;
+        let mut strategy = PlatformExprStrategy::new(cfg);
+        strategy.rebalance_day_counter = 2;
+
+        let decision = strategy.on_day(&ctx).expect("platform decision");
+
+        assert!(
+            decision.order_intents.iter().any(|intent| matches!(
+                intent,
+                OrderIntent::Value {
+                    symbol,
+                    reason,
+                    ..
+                } if symbol == "000002.SZ" && reason == "daily_top_up_buy"
+            )),
+            "{:?}",
+            decision.order_intents
+        );
+        assert!(
+            !decision.order_intents.iter().any(|intent| matches!(
+                intent,
+                OrderIntent::Value { symbol, .. } if symbol == "000003.SZ"
+            )),
+            "{:?}",
+            decision.order_intents
+        );
+    }
+
     #[test]
     fn platform_aiquant_remaining_buy_cash_uses_strategy_visible_positions() {
         let prev_date = d(2025, 2, 2);