diff --git a/crates/fidc-core/src/platform_expr_strategy.rs b/crates/fidc-core/src/platform_expr_strategy.rs
index 776720e..67c08ce 100644
--- a/crates/fidc-core/src/platform_expr_strategy.rs
+++ b/crates/fidc-core/src/platform_expr_strategy.rs
@@ -2283,9 +2283,21 @@ impl PlatformExprStrategy {
         loop {
             let mut budget_working_symbols = slot_working_symbols.clone();
             budget_working_symbols.extend(same_bar_buy_symbols.iter().cloned());
-            if Self::effective_slot_count(&budget_working_symbols, slot_blocking_symbols)
-                >= selection_limit
-            {
+            let effective_slot_count =
+                Self::effective_slot_count(&budget_working_symbols, slot_blocking_symbols);
+            if effective_slot_count >= selection_limit {
+                if debug_daily_top_up {
+                    daily_top_up_debug_notes.push(format!(
+                        "daily_top_up_stop date={} reason=slot_full effective_slots={} selection_limit={} slot_working={} same_bar_buys={} slot_blocking={} current_position={}",
+                        execution_date,
+                        effective_slot_count,
+                        selection_limit,
+                        slot_working_symbols.len(),
+                        same_bar_buy_symbols.len(),
+                        slot_blocking_symbols.len(),
+                        current_position_symbol.unwrap_or("-")
+                    ));
+                }
                 break;
             }
             let value_symbols = budget_working_symbols.clone();
@@ -2328,6 +2340,15 @@ impl PlatformExprStrategy {
                 ));
             }
             if slot_buy_cash <= 0.0 || available_buy_cash < slot_buy_cash * 0.5 {
+                if debug_daily_top_up {
+                    daily_top_up_debug_notes.push(format!(
+                        "daily_top_up_stop date={} reason=insufficient_cash slot_buy_cash={:.4} available_cash={:.4} current_position={}",
+                        execution_date,
+                        slot_buy_cash,
+                        available_buy_cash,
+                        current_position_symbol.unwrap_or("-")
+                    ));
+                }
                 break;
             }
 
@@ -2415,6 +2436,19 @@ impl PlatformExprStrategy {
                 }
             }
             if !attempted_any || !filled_any {
+                if debug_daily_top_up {
+                    daily_top_up_debug_notes.push(format!(
+                        "daily_top_up_stop date={} reason=no_candidate attempted_any={} filled_any={} current_position={} attempted_buys={} exit_symbols={} pending_full_close={} delayed_sold={}",
+                        execution_date,
+                        attempted_any,
+                        filled_any,
+                        current_position_symbol.unwrap_or("-"),
+                        intraday_attempted_buys.len(),
+                        exit_symbols.len(),
+                        pending_full_close_symbols.len(),
+                        delayed_sold_symbols.len()
+                    ));
+                }
                 break;
             }
         }