diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 8886fab..e833a00 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -5295,10 +5295,11 @@ class PurchaseTradeTestCase(ModuleTestCase):
         graph_field = pages[pnl_index + 1].find("field[@name='pnl_graph']")
         self.assertIsNotNone(graph_field)
         self.assertEqual(graph_field.get('widget'), 'rich_graph')
+        self.assertEqual(graph_field.get('records_field'), 'pnl_graph')
         self.assertEqual(graph_field.get('date_field'), 'valuation_date')
         self.assertEqual(graph_field.get('series'), 'pnl,mtm')
         self.assertEqual(graph_field.get('labels'), 'pnl:Pnl,mtm:Mtm')
-        self.assertIsNone(graph_field.get('hidden_series'))
+        self.assertEqual(graph_field.get('hidden_series'), 'pnl_graph')
 
     def test_shipment_in_pnl_lines_use_physical_and_open_lots(self):
         'shipment PnL uses valuation lines from physical and open lot links'
diff --git a/modules/purchase_trade/view/purchase_form.xml b/modules/purchase_trade/view/purchase_form.xml
index 79841eb..5a5be8a 100755
--- a/modules/purchase_trade/view/purchase_form.xml
+++ b/modules/purchase_trade/view/purchase_form.xml
@@ -159,10 +159,12 @@ this repository contains the full copyright notices and license terms. -->
         <page string="Pnl graph" col="4" id="pnl_graph">
             <field name="pnl_graph"
                 widget="rich_graph"
+                records_field="pnl_graph"
                 date_field="valuation_date"
                 series="pnl,mtm"
                 labels="pnl:Pnl,mtm:Mtm"
                 colors="pnl:#00b894,mtm:#8b5cf6"
+                hidden_series="pnl_graph"
                 height="360"
                 colspan="4"/>
         </page>