diff --git a/pos_margin/__manifest__.py b/pos_margin/__manifest__.py
index 38502c1b..95ec672b 100644
--- a/pos_margin/__manifest__.py
+++ b/pos_margin/__manifest__.py
@@ -9,6 +9,7 @@
     'category': 'Point Of Sale',
     'author': "GRAP,"
               "Odoo Community Association (OCA)",
+    "maintainers": ["legalsylvain"],
     'website': 'https://github.com/OCA/pos',
     'license': 'AGPL-3',
     'depends': [
diff --git a/pos_margin/models/pos_order.py b/pos_margin/models/pos_order.py
index e3f306bc..557b64a4 100644
--- a/pos_margin/models/pos_order.py
+++ b/pos_margin/models/pos_order.py
@@ -11,14 +11,29 @@ class PosOrder(models.Model):
 
     # Columns Section
     margin = fields.Float(
-        'Margin', compute='_compute_margin', store=True,
+        string='Margin',
+        compute='_compute_margin',
+        store=True,
         digits=dp.get_precision('Product Price'),
         help="It gives profitability by calculating the difference between"
         " the Unit Price and the cost price.")
 
+    margin_percent = fields.Float(
+        string='Margin (%)',
+        compute='_compute_margin',
+        store=True,
+        digits=dp.get_precision('Product Price'),
+    )
+
     # Compute Section
     @api.multi
-    @api.depends('lines.margin')
+    @api.depends('lines.margin', 'lines.price_subtotal')
     def _compute_margin(self):
         for order in self:
-            order.margin = sum(order.mapped('lines.margin'))
+            tmp_margin = sum(order.mapped('lines.margin'))
+            tmp_price_subtotal = sum(order.mapped('lines.price_subtotal'))
+            order.update({
+                'margin': tmp_margin,
+                'margin_percent': tmp_price_subtotal and (
+                    tmp_margin / tmp_price_subtotal * 100),
+            })
diff --git a/pos_margin/models/pos_order_line.py b/pos_margin/models/pos_order_line.py
index 9cb14f33..3bd46ead 100644
--- a/pos_margin/models/pos_order_line.py
+++ b/pos_margin/models/pos_order_line.py
@@ -11,12 +11,25 @@ class PosOrderLine(models.Model):
 
     # Columns Section
     margin = fields.Float(
-        'Margin', compute='_compute_multi_margin', store=True,
-        multi='multi_margin', digits=dp.get_precision('Product Price'))
+        string='Margin',
+        compute='_compute_multi_margin',
+        store=True,
+        digits=dp.get_precision('Product Price'),
+    )
+
+    margin_percent = fields.Float(
+        string='Margin (%)',
+        compute='_compute_multi_margin',
+        store=True,
+        digits=dp.get_precision('Product Price'),
+    )
 
     purchase_price = fields.Float(
-        'Cost Price', compute='_compute_multi_margin', store=True,
-        multi='multi_margin', digits=dp.get_precision('Product Price'))
+        string='Cost Price',
+        compute='_compute_multi_margin',
+        store=True,
+        digits=dp.get_precision('Product Price'),
+    )
 
     # Compute Section
     @api.multi
@@ -24,8 +37,13 @@ class PosOrderLine(models.Model):
     def _compute_multi_margin(self):
         for line in self.filtered('product_id'):
             purchase_price = self._get_purchase_price(line)
-            line.purchase_price = purchase_price
-            line.margin = line.price_subtotal - (purchase_price * line.qty)
+            margin = line.price_subtotal - (purchase_price * line.qty)
+            line.update({
+                'purchase_price': purchase_price,
+                'margin': margin,
+                'margin_percent': line.price_subtotal and (
+                    margin / line.price_subtotal * 100.0),
+            })
 
     @api.model
     def _get_purchase_price(self, line):
diff --git a/pos_margin/readme/USAGE.rst b/pos_margin/readme/USAGE.rst
index e719a37a..6d342a5e 100644
--- a/pos_margin/readme/USAGE.rst
+++ b/pos_margin/readme/USAGE.rst
@@ -1,7 +1,13 @@
 To use this module, you need to:
 
 * Go to 'Point Of Sale' / 'Orders' / 'Orders'
+
+.. figure:: ../static/description/pos_order_tree.png
+   :width: 800px
+
+
 * Open an order
 
 .. figure:: ../static/description/pos_order_form.png
    :width: 800px
+
diff --git a/pos_margin/static/description/pos_order_form.png b/pos_margin/static/description/pos_order_form.png
index 22601768..1ff9c314 100644
Binary files a/pos_margin/static/description/pos_order_form.png and b/pos_margin/static/description/pos_order_form.png differ
diff --git a/pos_margin/static/description/pos_order_tree.png b/pos_margin/static/description/pos_order_tree.png
new file mode 100644
index 00000000..f65204fe
Binary files /dev/null and b/pos_margin/static/description/pos_order_tree.png differ
diff --git a/pos_margin/views/view_pos_order.xml b/pos_margin/views/view_pos_order.xml
index 75d24452..86797b70 100644
--- a/pos_margin/views/view_pos_order.xml
+++ b/pos_margin/views/view_pos_order.xml
@@ -13,9 +13,12 @@ License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
         <field name="arch" type="xml">
             <field name="amount_total" position="after">
                     <field name="margin" widget="monetary"/>
+                    <field name="margin_percent" widget="monetary"/>
             </field>
-            <xpath expr="//field[@name='lines']/tree/field[@name='price_unit']" position="after">
+            <xpath expr="//field[@name='lines']/tree/field[@name='discount']" position="after">
                 <field name="purchase_price" widget="monetary"/>
+                <field name="margin"/>
+                <field name="margin_percent"/>
             </xpath>
         </field>
     </record>
@@ -25,7 +28,8 @@ License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
         <field name="inherit_id" ref="point_of_sale.view_pos_order_tree"/>
         <field name="arch" type="xml">
             <field name="amount_total" position="before">
-                    <field name="margin" widget="monetary" sum="Margin Total"/>
+                    <field name="margin" widget="monetary" sum="Total"/>
+                    <field name="margin_percent" widget="monetary"/>
             </field>
         </field>
     </record>