diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index b8be77a..986c60a 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -3357,19 +3357,23 @@ class PurchasePnlGraph(ModelSQL, ModelView):
     @classmethod
     def table_query(cls):
         Valuation = Pool().get('valuation.valuation')
+        PurchaseLine = Pool().get('purchase.line')
         val = Valuation.__table__()
-        return val.select(
+        line = PurchaseLine.__table__()
+        purchase = Coalesce(val.purchase, line.purchase)
+        return val.join(
+            line, 'LEFT', condition=val.line == line.id).select(
             Literal(0).as_('create_uid'),
             CurrentTimestamp().as_('create_date'),
             Literal(None).as_('write_uid'),
             Literal(None).as_('write_date'),
             Max(val.id).as_('id'),
-            val.purchase.as_('purchase'),
+            purchase.as_('purchase'),
             val.date.as_('valuation_date'),
             Sum(Coalesce(val.pnl, 0)).as_('pnl'),
             Sum(Coalesce(val.mtm, 0)).as_('mtm'),
-            where=(val.purchase != None),
-            group_by=[val.purchase, val.date],
+            where=(purchase != None),
+            group_by=[purchase, val.date],
             order_by=[val.date.asc])
 
 
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 4aab691..a7ea05e 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -5304,6 +5304,12 @@ class PurchaseTradeTestCase(ModuleTestCase):
         self.assertEqual(graph_field.get('labels'), 'pnl:Pnl,mtm:Mtm')
         self.assertEqual(graph_field.get('hidden_series'), 'pnl_graph')
 
+        value_fields = pages[pnl_index + 1].findall("field[@name='pnl_graph']")
+        self.assertEqual(value_fields[1].get('mode'), 'tree')
+        self.assertEqual(
+            value_fields[1].get('view_ids'),
+            'purchase_trade.purchase_pnl_graph_view_tree')
+
     def test_shipment_in_pnl_lines_use_physical_and_open_lots(self):
         'shipment PnL uses valuation lines from physical and open lot links'
         ShipmentIn = Pool().get('stock.shipment.in')
diff --git a/modules/purchase_trade/view/purchase_form.xml b/modules/purchase_trade/view/purchase_form.xml
index 54d95da..81ffac7 100755
--- a/modules/purchase_trade/view/purchase_form.xml
+++ b/modules/purchase_trade/view/purchase_form.xml
@@ -168,6 +168,12 @@ this repository contains the full copyright notices and license terms. -->
                 hidden_series="pnl_graph"
                 height="360"
                 colspan="4"/>
+            <separator string="Pnl graph values" colspan="4"/>
+            <field name="pnl_graph"
+                mode="tree"
+                view_ids="purchase_trade.purchase_pnl_graph_view_tree"
+                height="160"
+                colspan="4"/>
         </page>
     </xpath>
     <xpath expr="/form/notebook/page[@id='info']/label[@name='invoice_party']" position="before">