diff --git a/src/pyside6/trade_widget.py b/src/pyside6/trade_widget.py
index a54a9cd..93cc66f 100644
--- a/src/pyside6/trade_widget.py
+++ b/src/pyside6/trade_widget.py
@@ -62,8 +62,12 @@ class TradeWidget(QWidget):
 
 class TradeCollection(QWidget):
     """docstring for TradeCollection."""
-    def __init__(self, message: Message):
+
+    def __init__(self,
+                 message: Message,
+                 parent):
         super(TradeCollection, self).__init__()
+        self.parent = parent
         self.main_layout = QVBoxLayout()
         self.setLayout(self.main_layout)
         trade = TradeWidget(message, self)
@@ -80,4 +84,5 @@ class TradeCollection(QWidget):
     def del_trade(self, message: Message):
         del self.trades[message.trade.__hash__]
         if not self.trades:
+            self.parent.del_collection(message.trade.unique_item())
             self.deleteLater()