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diff --git a/addons/product_margin/models/__init__.py b/addons/product_margin/models/__init__.py
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+++ b/addons/product_margin/models/__init__.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import product_product
\ No newline at end of file
diff --git a/addons/product_margin/models/product_product.py b/addons/product_margin/models/product_product.py
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+++ b/addons/product_margin/models/product_product.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import time
+
+from odoo import api, fields, models
+
+
+class ProductProduct(models.Model):
+    _inherit = "product.product"
+
+    date_from = fields.Date(compute='_compute_product_margin_fields_values', string='Margin Date From')
+    date_to = fields.Date(compute='_compute_product_margin_fields_values', string='Margin Date To')
+    invoice_state = fields.Selection(compute='_compute_product_margin_fields_values',
+        selection=[
+            ('paid', 'Paid'),
+            ('open_paid', 'Open and Paid'),
+            ('draft_open_paid', 'Draft, Open and Paid')
+        ], string='Invoice State', readonly=True)
+    sale_avg_price = fields.Float(compute='_compute_product_margin_fields_values', string='Avg. Sale Unit Price',
+        help="Avg. Price in Customer Invoices.")
+    purchase_avg_price = fields.Float(compute='_compute_product_margin_fields_values', string='Avg. Purchase Unit Price',
+        help="Avg. Price in Vendor Bills ")
+    sale_num_invoiced = fields.Float(compute='_compute_product_margin_fields_values', string='# Invoiced in Sale',
+        help="Sum of Quantity in Customer Invoices")
+    purchase_num_invoiced = fields.Float(compute='_compute_product_margin_fields_values', string='# Invoiced in Purchase',
+        help="Sum of Quantity in Vendor Bills")
+    sales_gap = fields.Float(compute='_compute_product_margin_fields_values', string='Sales Gap',
+        help="Expected Sale - Turn Over")
+    purchase_gap = fields.Float(compute='_compute_product_margin_fields_values', string='Purchase Gap',
+        help="Normal Cost - Total Cost")
+    turnover = fields.Float(compute='_compute_product_margin_fields_values', string='Turnover',
+        help="Sum of Multiplication of Invoice price and quantity of Customer Invoices")
+    total_cost = fields.Float(compute='_compute_product_margin_fields_values', string='Total Cost',
+        help="Sum of Multiplication of Invoice price and quantity of Vendor Bills ")
+    sale_expected = fields.Float(compute='_compute_product_margin_fields_values', string='Expected Sale',
+        help="Sum of Multiplication of Sale Catalog price and quantity of Customer Invoices")
+    normal_cost = fields.Float(compute='_compute_product_margin_fields_values', string='Normal Cost',
+        help="Sum of Multiplication of Cost price and quantity of Vendor Bills")
+    total_margin = fields.Float(compute='_compute_product_margin_fields_values', string='Total Margin',
+        help="Turnover - Standard price")
+    expected_margin = fields.Float(compute='_compute_product_margin_fields_values', string='Expected Margin',
+        help="Expected Sale - Normal Cost")
+    total_margin_rate = fields.Float(compute='_compute_product_margin_fields_values', string='Total Margin Rate(%)',
+        help="Total margin * 100 / Turnover")
+    expected_margin_rate = fields.Float(compute='_compute_product_margin_fields_values', string='Expected Margin (%)',
+        help="Expected margin * 100 / Expected Sale")
+
+    @api.model
+    def read_group(self, domain, fields, groupby, offset=0, limit=None, orderby=False, lazy=True):
+        """
+            Inherit read_group to calculate the sum of the non-stored fields, as it is not automatically done anymore through the XML.
+        """
+        res = super(ProductProduct, self).read_group(domain, fields, groupby, offset=offset, limit=limit, orderby=orderby, lazy=lazy)
+        fields_list = ['turnover', 'sale_avg_price', 'sale_purchase_price', 'sale_num_invoiced', 'purchase_num_invoiced',
+                       'sales_gap', 'purchase_gap', 'total_cost', 'sale_expected', 'normal_cost', 'total_margin',
+                       'expected_margin', 'total_margin_rate', 'expected_margin_rate']
+        if any(x in fields for x in fields_list):
+            # Calculate first for every product in which line it needs to be applied
+            re_ind = 0
+            prod_re = {}
+            tot_products = self.browse([])
+            for re in res:
+                if re.get('__domain'):
+                    products = self.search(re['__domain'])
+                    tot_products |= products
+                    for prod in products:
+                        prod_re[prod.id] = re_ind
+                re_ind += 1
+            res_val = tot_products._compute_product_margin_fields_values(field_names=[x for x in fields if fields in fields_list])
+            for key in res_val:
+                for l in res_val[key]:
+                    re = res[prod_re[key]]
+                    if re.get(l):
+                        re[l] += res_val[key][l]
+                    else:
+                        re[l] = res_val[key][l]
+        return res
+
+    def _compute_product_margin_fields_values(self, field_names=None):
+        if field_names is None:
+            field_names = []
+        date_from = self.env.context.get('date_from', time.strftime('%Y-01-01'))
+        date_to = self.env.context.get('date_to', time.strftime('%Y-12-31'))
+        invoice_state = self.env.context.get('invoice_state', 'open_paid')
+        res = {
+            product_id: {'date_from': date_from, 'date_to': date_to, 'invoice_state': invoice_state, 'turnover': 0.0,
+                'sale_avg_price': 0.0, 'purchase_avg_price': 0.0, 'sale_num_invoiced': 0.0, 'purchase_num_invoiced': 0.0,
+                'sales_gap': 0.0, 'purchase_gap': 0.0, 'total_cost': 0.0, 'sale_expected': 0.0, 'normal_cost': 0.0, 'total_margin': 0.0,
+                'expected_margin': 0.0, 'total_margin_rate': 0.0, 'expected_margin_rate': 0.0}
+            for product_id in self.ids
+        }
+        states = ()
+        payment_states = ()
+        if invoice_state == 'paid':
+            states = ('posted',)
+            payment_states = ('paid',)
+        elif invoice_state == 'open_paid':
+            states = ('posted',)
+            payment_states = ('not_paid', 'paid')
+        elif invoice_state == 'draft_open_paid':
+            states = ('posted', 'draft')
+            payment_states = ('not_paid', 'paid')
+        if "force_company" in self.env.context:
+            company_id = self.env.context['force_company']
+        else:
+            company_id = self.env.company.id
+        self.env['account.move.line'].flush(['price_unit', 'quantity', 'balance', 'product_id', 'display_type'])
+        self.env['account.move'].flush(['state', 'payment_state', 'move_type', 'invoice_date', 'company_id'])
+        self.env['product.template'].flush(['list_price'])
+        sqlstr = """
+                WITH currency_rate AS ({})
+                SELECT
+                    l.product_id as product_id,
+                    SUM(
+                        l.price_unit / (CASE COALESCE(cr.rate, 0) WHEN 0 THEN 1.0 ELSE cr.rate END) *
+                        l.quantity * (CASE WHEN i.move_type IN ('out_invoice', 'in_invoice') THEN 1 ELSE -1 END) * ((100 - l.discount) * 0.01)
+                    ) / NULLIF(SUM(l.quantity * (CASE WHEN i.move_type IN ('out_invoice', 'in_invoice') THEN 1 ELSE -1 END)), 0) AS avg_unit_price,
+                    SUM(l.quantity * (CASE WHEN i.move_type IN ('out_invoice', 'in_invoice') THEN 1 ELSE -1 END)) AS num_qty,
+                    SUM(ABS(l.balance) * (CASE WHEN i.move_type IN ('out_invoice', 'in_invoice') THEN 1 ELSE -1 END)) AS total,
+                    SUM(l.quantity * pt.list_price * (CASE WHEN i.move_type IN ('out_invoice', 'in_invoice') THEN 1 ELSE -1 END)) AS sale_expected
+                FROM account_move_line l
+                LEFT JOIN account_move i ON (l.move_id = i.id)
+                LEFT JOIN product_product product ON (product.id=l.product_id)
+                LEFT JOIN product_template pt ON (pt.id = product.product_tmpl_id)
+                left join currency_rate cr on
+                (cr.currency_id = i.currency_id and
+                 cr.company_id = i.company_id and
+                 cr.date_start <= COALESCE(i.invoice_date, NOW()) and
+                 (cr.date_end IS NULL OR cr.date_end > COALESCE(i.invoice_date, NOW())))
+                WHERE l.product_id IN %s
+                AND i.state IN %s
+                AND i.payment_state IN %s
+                AND i.move_type IN %s
+                AND i.invoice_date BETWEEN %s AND  %s
+                AND i.company_id = %s
+                AND l.display_type IS NULL
+                AND l.exclude_from_invoice_tab = false
+                GROUP BY l.product_id
+                """.format(self.env['res.currency']._select_companies_rates())
+        invoice_types = ('out_invoice', 'out_refund')
+        self.env.cr.execute(sqlstr, (tuple(self.ids), states, payment_states, invoice_types, date_from, date_to, company_id))
+        for product_id, avg, qty, total, sale in self.env.cr.fetchall():
+            res[product_id]['sale_avg_price'] = avg and avg or 0.0
+            res[product_id]['sale_num_invoiced'] = qty and qty or 0.0
+            res[product_id]['turnover'] = total and total or 0.0
+            res[product_id]['sale_expected'] = sale and sale or 0.0
+            res[product_id]['sales_gap'] = res[product_id]['sale_expected'] - res[product_id]['turnover']
+            res[product_id]['total_margin'] = res[product_id]['turnover']
+            res[product_id]['expected_margin'] = res[product_id]['sale_expected']
+            res[product_id]['total_margin_rate'] = res[product_id]['turnover'] and res[product_id]['total_margin'] * 100 / res[product_id]['turnover'] or 0.0
+            res[product_id]['expected_margin_rate'] = res[product_id]['sale_expected'] and res[product_id]['expected_margin'] * 100 / res[product_id]['sale_expected'] or 0.0
+
+        ctx = self.env.context.copy()
+        ctx['force_company'] = company_id
+        invoice_types = ('in_invoice', 'in_refund')
+        self.env.cr.execute(sqlstr, (tuple(self.ids), states, payment_states, invoice_types, date_from, date_to, company_id))
+        for product_id, avg, qty, total, dummy in self.env.cr.fetchall():
+            res[product_id]['purchase_avg_price'] = avg and avg or 0.0
+            res[product_id]['purchase_num_invoiced'] = qty and qty or 0.0
+            res[product_id]['total_cost'] = total and total or 0.0
+            res[product_id]['total_margin'] = res[product_id].get('turnover', 0.0) - res[product_id]['total_cost']
+            res[product_id]['total_margin_rate'] = res[product_id].get('turnover', 0.0) and res[product_id]['total_margin'] * 100 / res[product_id].get('turnover', 0.0) or 0.0
+        for product in self:
+            res[product.id]['normal_cost'] = product.standard_price * res[product.id]['purchase_num_invoiced']
+            res[product.id]['purchase_gap'] = res[product.id]['normal_cost'] - res[product.id]['total_cost']
+            res[product.id]['expected_margin'] = res[product.id].get('sale_expected', 0.0) - res[product.id]['normal_cost']
+            res[product.id]['expected_margin_rate'] = res[product.id].get('sale_expected', 0.0) and res[product.id]['expected_margin'] * 100 / res[product.id].get('sale_expected', 0.0) or 0.0
+            product.write(res[product.id])
+        return res