diff --git a/book.py b/book.py
index f438d5d..b753742 100644
--- a/book.py
+++ b/book.py
@@ -180,10 +180,11 @@ class Book(SymbolMixin, metaclass=PoolMeta):
             ).select(
                 tab_book.id,    # 0
                 Coalesce(Sum(Case(
-                    (tab_line.date <= query_date, tab_line.quantity),
+                    (tab_line.date <= query_date,
+                        tab_line.quantity_credit - tab_line.quantity_debit),
                     else_ = Decimal('0.0'),
                 )), Decimal('0.0')).as_('quantity'),    # 1
-                Sum(tab_line.quantity).as_('quantity_all'), # 2
+                Sum(tab_line.quantity_credit - tab_line.quantity_debit).as_('quantity_all'), # 2
                 Coalesce(tab_rate.rate, Decimal('0.0')).as_('rate'),    # 3
                 tab_book.currency, # 4
                 tab_cur.digits.as_('currency_digits'),     # 5
diff --git a/line.py b/line.py
index d1d0584..b724fd2 100644
--- a/line.py
+++ b/line.py
@@ -9,27 +9,37 @@ from trytond.pool import PoolMeta
 from trytond.pyson import Eval, Or, If
 from trytond.modules.cashbook.line import STATES, DEPENDS
 
+STATESQ = {
+    'required': Or(
+            Eval('feature', '') == 'asset',
+            Eval('booktransf_feature', '') == 'asset',
+        ),
+    'invisible': ~Or(
+            Eval('feature', '') == 'asset',
+            Eval('booktransf_feature', '') == 'asset',
+        ),
+    'readonly': Or(
+        STATES['readonly'],
+        Eval('bookingtype', '').in_(['spin', 'spout']),
+        ),
+    }
+DEPENDSQ = DEPENDS+['feature', 'booktransf_feature',
+    'quantity_digits', 'bookingtype']
+
 
 class Line(metaclass=PoolMeta):
     __name__ = 'cashbook.line'
 
     quantity = fields.Numeric(string='Quantity',
         digits=(16, Eval('quantity_digits', 4)),
-        states={
-            'required': Or(
-                    Eval('feature', '') == 'asset',
-                    Eval('booktransf_feature', '') == 'asset',
-                ),
-            'invisible': ~Or(
-                    Eval('feature', '') == 'asset',
-                    Eval('booktransf_feature', '') == 'asset',
-                ),
-            'readonly': Or(
-                STATES['readonly'],
-                Eval('bookingtype', '').in_(['spin', 'spout']),
-                ),
-        }, depends=DEPENDS+['feature', 'booktransf_feature',
-            'quantity_digits', 'bookingtype'])
+        states=STATESQ, depends=DEPENDSQ)
+    quantity_credit = fields.Numeric(string='Quantity Credit',
+        digits=(16, Eval('quantity_digits', 4)),
+        states=STATESQ, depends=DEPENDSQ)
+    quantity_debit = fields.Numeric(string='Quantity Debit',
+        digits=(16, Eval('quantity_digits', 4)),
+        states=STATESQ, depends=DEPENDSQ)
+
     quantity_digits = fields.Function(fields.Integer(string='Digits',
         readonly=True, states={'invisible': True}),
         'on_change_with_quantity_digits')
@@ -46,6 +56,35 @@ class Line(metaclass=PoolMeta):
         }, depends=['currency_digits', 'quantity_digits', 'feature']),
         'on_change_with_asset_rate')
 
+    @classmethod
+    def get_debit_credit(cls, values):
+        """ compute quantity_debit/quantity_credit from quantity
+        """
+        values2 = super(Line, cls).get_debit_credit(values)
+
+        if isinstance(values, dict):
+            type_ = values.get('bookingtype', None)
+            quantity = values.get('quantity', None)
+        else :
+            type_ = getattr(values, 'bookingtype', None)
+            quantity = getattr(values, 'quantity', None)
+
+        if type_:
+            if quantity is not None:
+                if type_ in ['in', 'mvin', 'spin']:
+                    values2.update({
+                        'quantity_debit': Decimal('0.0'),
+                        'quantity_credit': quantity,
+                        })
+                elif type_ in ['out', 'mvout', 'spout']:
+                    values2.update({
+                        'quantity_debit': quantity,
+                        'quantity_credit': Decimal('0.0'),
+                        })
+                else :
+                    raise ValueError('invalid "bookingtype"')
+        return values2
+
     @classmethod
     def get_counterpart_values(cls, line, values={}):
         """ add quantity to counterpart
diff --git a/locale/de.po b/locale/de.po
index 11e068f..4657712 100644
--- a/locale/de.po
+++ b/locale/de.po
@@ -122,6 +122,14 @@ msgctxt "field:cashbook.line,quantity:"
 msgid "Quantity"
 msgstr "Anzahl"
 
+msgctxt "field:cashbook.line,quantity_credit:"
+msgid "Quantity Credit"
+msgstr "Anzahlgutschrift"
+
+msgctxt "field:cashbook.line,quantity_debit:"
+msgid "Quantity Debit"
+msgstr "Anzahllastschrift"
+
 msgctxt "field:cashbook.line,quantity_symbol:"
 msgid "Symbol"
 msgstr "Symbol"
diff --git a/locale/en.po b/locale/en.po
index 870dabd..04c095d 100644
--- a/locale/en.po
+++ b/locale/en.po
@@ -1,116 +1,124 @@
-#
-msgid ""
-msgstr "Content-Type: text/plain; charset=utf-8\n"
-
-msgctxt "model:ir.message,text:msg_btype_asset"
-msgid "Asset"
-msgstr "Asset"
-
-msgctxt "view:cashbook.book:"
-msgid "Asset"
-msgstr "Asset"
-
-msgctxt "view:cashbook.book:"
-msgid "Quantity"
-msgstr "Quantity"
-
-msgctxt "view:cashbook.book:"
-msgid "Current valuation of the investment"
-msgstr "Current valuation of the investment"
-
-msgctxt "field:cashbook.book,asset:"
-msgid "Asset"
-msgstr "Asset"
-
-msgctxt "field:cashbook.book,quantity_digits:"
-msgid "Digits"
-msgstr "Digits"
-
-msgctxt "help:cashbook.book,quantity_digits:"
-msgid "Quantity Digits"
-msgstr "Quantity Digits"
-
-msgctxt "help:cashbook.book,asset_uomcat:"
-msgid "UOM Category"
-msgstr "UOM Category"
-
-msgctxt "field:cashbook.book,quantity_uom:"
-msgid "UOM"
-msgstr "UOM"
-
-msgctxt "field:cashbook.book,symbol:"
-msgid "Symbol"
-msgstr "Symbol"
-
-msgctxt "field:cashbook.book,asset_symbol:"
-msgid "Symbol"
-msgstr "Symbol"
-
-msgctxt "field:cashbook.book,quantity:"
-msgid "Quantity"
-msgstr "Quantity"
-
-msgctxt "help:cashbook.book,quantity:"
-msgid "Quantity of assets until to date"
-msgstr "Quantity of assets until to date"
-
-msgctxt "field:cashbook.book,quantity_all:"
-msgid "Total Quantity"
-msgstr "Total Quantity"
-
-msgctxt "help:cashbook.book,quantity_all:"
-msgid "Total quantity of all assets"
-msgstr "Total quantity of all assets"
-
-msgctxt "field:cashbook.book,current_value:"
-msgid "Value"
-msgstr "Value"
-
-msgctxt "help:cashbook.book,current_value:"
-msgid "Valuation of the investment based on the current stock market price."
-msgstr "Valuation of the investment based on the current stock market price."
-
-msgctxt "field:cashbook.book,current_value_ref:"
-msgid "Value (Ref.)"
-msgstr "Value (Ref.)"
-
-msgctxt "help:cashbook.book,current_value_ref:"
-msgid "Valuation of the investment based on the current stock exchange price, converted into the company currency."
-msgstr "Valuation of the investment based on the current stock exchange price, converted into the company currency."
-
-msgctxt "field:cashbook.book,diff_amount:"
-msgid "Difference"
-msgstr "Difference"
-
-msgctxt "help:cashbook.book,diff_amount:"
-msgid "Difference between acquisition value and current value"
-msgstr "Difference between acquisition value and current value"
-
-msgctxt "field:cashbook.book,diff_percent:"
-msgid "Percent"
-msgstr "Percent"
-
-msgctxt "help:cashbook.book,diff_percent:"
-msgid "percentage performance since acquisition"
-msgstr "percentage performance since acquisition"
-
-msgctxt "field:cashbook.book,current_rate:"
-msgid "Rate"
-msgstr "Rate"
-
-msgctxt "help:cashbook.book,current_rate:"
-msgid "Rate per unit of investment based on current stock exchange price."
-msgstr "Rate per unit of investment based on current stock exchange price."
-
-msgctxt "field:cashbook.line,quantity_digits:"
-msgid "Digits"
-msgstr "Digits"
-
-msgctxt "field:cashbook.line,quantity:"
-msgid "Quantity"
-msgstr "Quantity"
-
-msgctxt "field:cashbook.line,quantity_symbol:"
-msgid "Symbol"
-msgstr "Symbol"
-
+#
+msgid ""
+msgstr "Content-Type: text/plain; charset=utf-8\n"
+
+msgctxt "model:ir.message,text:msg_btype_asset"
+msgid "Asset"
+msgstr "Asset"
+
+msgctxt "view:cashbook.book:"
+msgid "Asset"
+msgstr "Asset"
+
+msgctxt "view:cashbook.book:"
+msgid "Quantity"
+msgstr "Quantity"
+
+msgctxt "view:cashbook.book:"
+msgid "Current valuation of the investment"
+msgstr "Current valuation of the investment"
+
+msgctxt "field:cashbook.book,asset:"
+msgid "Asset"
+msgstr "Asset"
+
+msgctxt "field:cashbook.book,quantity_digits:"
+msgid "Digits"
+msgstr "Digits"
+
+msgctxt "help:cashbook.book,quantity_digits:"
+msgid "Quantity Digits"
+msgstr "Quantity Digits"
+
+msgctxt "help:cashbook.book,asset_uomcat:"
+msgid "UOM Category"
+msgstr "UOM Category"
+
+msgctxt "field:cashbook.book,quantity_uom:"
+msgid "UOM"
+msgstr "UOM"
+
+msgctxt "field:cashbook.book,symbol:"
+msgid "Symbol"
+msgstr "Symbol"
+
+msgctxt "field:cashbook.book,asset_symbol:"
+msgid "Symbol"
+msgstr "Symbol"
+
+msgctxt "field:cashbook.book,quantity:"
+msgid "Quantity"
+msgstr "Quantity"
+
+msgctxt "help:cashbook.book,quantity:"
+msgid "Quantity of assets until to date"
+msgstr "Quantity of assets until to date"
+
+msgctxt "field:cashbook.book,quantity_all:"
+msgid "Total Quantity"
+msgstr "Total Quantity"
+
+msgctxt "help:cashbook.book,quantity_all:"
+msgid "Total quantity of all assets"
+msgstr "Total quantity of all assets"
+
+msgctxt "field:cashbook.book,current_value:"
+msgid "Value"
+msgstr "Value"
+
+msgctxt "help:cashbook.book,current_value:"
+msgid "Valuation of the investment based on the current stock market price."
+msgstr "Valuation of the investment based on the current stock market price."
+
+msgctxt "field:cashbook.book,current_value_ref:"
+msgid "Value (Ref.)"
+msgstr "Value (Ref.)"
+
+msgctxt "help:cashbook.book,current_value_ref:"
+msgid "Valuation of the investment based on the current stock exchange price, converted into the company currency."
+msgstr "Valuation of the investment based on the current stock exchange price, converted into the company currency."
+
+msgctxt "field:cashbook.book,diff_amount:"
+msgid "Difference"
+msgstr "Difference"
+
+msgctxt "help:cashbook.book,diff_amount:"
+msgid "Difference between acquisition value and current value"
+msgstr "Difference between acquisition value and current value"
+
+msgctxt "field:cashbook.book,diff_percent:"
+msgid "Percent"
+msgstr "Percent"
+
+msgctxt "help:cashbook.book,diff_percent:"
+msgid "percentage performance since acquisition"
+msgstr "percentage performance since acquisition"
+
+msgctxt "field:cashbook.book,current_rate:"
+msgid "Rate"
+msgstr "Rate"
+
+msgctxt "help:cashbook.book,current_rate:"
+msgid "Rate per unit of investment based on current stock exchange price."
+msgstr "Rate per unit of investment based on current stock exchange price."
+
+msgctxt "field:cashbook.line,quantity_digits:"
+msgid "Digits"
+msgstr "Digits"
+
+msgctxt "field:cashbook.line,quantity:"
+msgid "Quantity"
+msgstr "Quantity"
+
+msgctxt "field:cashbook.line,quantity_credit:"
+msgid "Quantity Credit"
+msgstr "Quantity Credit"
+
+msgctxt "field:cashbook.line,quantity_debit:"
+msgid "Quantity Debit"
+msgstr "Quantity Debit"
+
+msgctxt "field:cashbook.line,quantity_symbol:"
+msgid "Symbol"
+msgstr "Symbol"
+
diff --git a/tests/test_book.py b/tests/test_book.py
index 0fc41f5..ad568d0 100644
--- a/tests/test_book.py
+++ b/tests/test_book.py
@@ -55,6 +55,7 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
         """
         pool = Pool()
         Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
         BType = pool.get('cashbook.type')
         Asset = pool.get('investment.asset')
 
@@ -129,17 +130,24 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
 
         self.assertEqual(book.lines[0].amount, Decimal('2.5'))
         self.assertEqual(book.lines[0].quantity, Decimal('1.453'))
+        self.assertEqual(book.lines[0].quantity_credit, Decimal('1.453'))
+        self.assertEqual(book.lines[0].quantity_debit, Decimal('0.0'))
         self.assertEqual(book.lines[0].quantity_digits, 3)
         self.assertEqual(book.lines[0].quantity_uom.symbol, 'u')
 
         self.assertEqual(book.lines[1].amount, Decimal('4.0'))
         self.assertEqual(book.lines[1].quantity, Decimal('3.3'))
+        self.assertEqual(book.lines[1].quantity_credit, Decimal('3.3'))
+        self.assertEqual(book.lines[1].quantity_debit, Decimal('0.0'))
         self.assertEqual(book.lines[1].quantity_digits, 3)
         self.assertEqual(book.lines[1].quantity_uom.symbol, 'u')
 
         self.assertEqual(book.symbol, '€/u')
         self.assertEqual(book.asset.rec_name, 'Product 1 | 2.8000 usd/u | 05/02/2022')
 
+        # wf --> check
+        Line.wfcheck(book.lines)
+
         # check quantities at cashbook
         with Transaction().set_context({
             'qdate': date(2022, 5, 5),
@@ -466,6 +474,7 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
     @with_transaction()
     def test_assetbook_check_bookingtype_mvout(self):
         """ create cashbook + line, bookingtype 'mvout'
+            transfer from cash to depot (buy asset, pay from cash)
         """
         pool = Pool()
         Book = pool.get('cashbook.book')
@@ -537,7 +546,10 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
         self.assertEqual(len(book.lines), 1)
         self.assertEqual(book.lines[0].rec_name, '05/01/2022|to|-1.00 usd|Transfer Out [Asset-Book | 1.00 usd | Open]')
         self.assertEqual(book.lines[0].state, 'check')
+        self.assertEqual(book.lines[0].bookingtype, 'mvout')
         self.assertEqual(book.lines[0].quantity, Decimal('1.5'))
+        self.assertEqual(book.lines[0].quantity_credit, Decimal('0.0'))
+        self.assertEqual(book.lines[0].quantity_debit, Decimal('1.5'))
         self.assertEqual(len(book.lines[0].references), 1)
         self.assertEqual(book.lines[0].reference, None)
         self.assertEqual(book.lines[0].references[0].id, book2.lines[0].id)
@@ -546,6 +558,10 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
         self.assertEqual(book2.lines[0].rec_name, '05/01/2022|from|1.00 usd|Transfer Out [Book 1 | -1.00 usd | Open]')
         self.assertEqual(book2.lines[0].state, 'check')
         self.assertEqual(book2.lines[0].quantity, Decimal('1.5'))
+        self.assertEqual(book2.lines[0].quantity_credit, Decimal('1.5'))
+        self.assertEqual(book2.lines[0].quantity_debit, Decimal('0.0'))
+        self.assertEqual(book2.lines[0].bookingtype, 'mvin')
+        self.assertEqual(book2.lines[0].asset_rate, Decimal('0.6667'))
         self.assertEqual(book2.lines[0].reference.rec_name, '05/01/2022|to|-1.00 usd|Transfer Out [Asset-Book | 1.00 usd | Open]')
         self.assertEqual(len(book2.lines[0].references), 0)
 
diff --git a/view/line_form.xml b/view/line_form.xml
index a135d0b..03d0559 100644
--- a/view/line_form.xml
+++ b/view/line_form.xml
@@ -10,6 +10,11 @@ full copyright notices and license terms. -->
         <label name="asset_rate"/>
         <field name="asset_rate" symbol="cashbook"/>
 
+        <label name="quantity_credit" />
+        <field name="quantity_credit" symbol="quantity_uom"/>
+        <label name="quantity_debit"/>
+        <field name="quantity_debit" symbol="quantity_uom"/>
+
         <field name="quantity_digits"/>
         <newline/>
     </xpath>