diff --git a/modules/purchase_trade/view/valuation_tree_sequence4.xml b/modules/purchase_trade/view/valuation_tree_sequence4.xml
index a7a87bf..02a9a09 100755
--- a/modules/purchase_trade/view/valuation_tree_sequence4.xml
+++ b/modules/purchase_trade/view/valuation_tree_sequence4.xml
@@ -9,9 +9,19 @@ this repository contains the full copyright notices and license terms. -->
     <field name="r_state"/>
     <field name="r_price"/>
     <field name="r_quantity" symbol="r_unit"/>
-    <field name="r_amount" sum="1"/>
+    <field name="r_amount"
+        sum="1"
+        sum_previous="r_amount_prev"
+        sum_variation="1"/>
+    <field name="r_amount_prev" optional="1"/>
     <field name="r_strategy"/>
-    <field name="r_mtm_price"/>
+    <field name="r_mtm_curve"/>
+    <field name="r_mtm_price"
+        widget="variation"
+        variation_previous="r_mtm_price_prev"
+        variation_group_by="r_mtm_curve"
+        variation_summary="1"/>
+    <field name="r_mtm_price_prev" optional="1"/>
     <field name="r_mtm" optional="0" sum="1"/>
 </tree>