diff --git a/line.py b/line.py
index 12e89b0..2461e12 100644
--- a/line.py
+++ b/line.py
@@ -10,6 +10,7 @@ from trytond.transaction import Transaction
 from trytond.report import Report
 from trytond.exceptions import UserError
 from trytond.i18n import gettext
+from trytond.modules.currency.ir import rate_decimal
 from decimal import Decimal
 from sql import Cast, Literal
 from sql.functions import DatePart
@@ -119,6 +120,23 @@ class Line(Workflow, ModelSQL, ModelView):
     payee = fields.Function(fields.Reference(string='Payee', readonly=True,
         selection=sel_payee), 'on_change_with_payee', searcher='search_payee')
 
+    amount_2nd_currency = fields.Numeric(string='Amount Second Currency',
+        digits=(16, Eval('currency2nd_digits', 2)),
+        states={
+            'readonly': STATES['readonly'],
+            'required': Bool(Eval('currency2nd')),
+            'invisible': ~Bool(Eval('currency2nd')),
+        }, depends=DEPENDS+['currency2nd_digits', 'currency2nd'])
+    rate_2nd_currency = fields.Function(fields.Numeric(string='Rate',
+        help='Exchange rate between the currencies of the participating cashbooks.',
+        digits=(rate_decimal * 2, rate_decimal),
+        states={
+            'readonly': STATES['readonly'],
+            'required': Bool(Eval('currency2nd')),
+            'invisible': ~Bool(Eval('currency2nd')),
+        }, depends=DEPENDS+['currency2nd_digits', 'currency2nd']),
+        'on_change_with_rate_2nd_currency', setter='set_rate_2nd_currency')
+
     # link to lines created by this record
     reference = fields.Many2One(string='Reference', readonly=True, select=True,
         states={
@@ -161,6 +179,10 @@ class Line(Workflow, ModelSQL, ModelView):
         string="Currency", readonly=True), 'on_change_with_currency')
     currency_digits = fields.Function(fields.Integer(string='Currency Digits',
         readonly=True), 'on_change_with_currency_digits')
+    currency2nd = fields.Function(fields.Many2One(model_name='currency.currency',
+        string="2nd Currency", readonly=True), 'on_change_with_currency2nd')
+    currency2nd_digits = fields.Function(fields.Integer(string='2nd Currency Digits',
+        readonly=True), 'on_change_with_currency2nd_digits')
 
     state = fields.Selection(string='State', required=True, readonly=True,
         select=True, selection=sel_linetype)
@@ -540,6 +562,88 @@ class Line(Workflow, ModelSQL, ModelView):
                 self.splitlines = []
                 self.booktransf = None
 
+    @fields.depends('currency', 'booktransf', '_parent_booktransf.currency', \
+        'amount', 'amount_2nd_currency', 'rate_2nd_currency')
+    def on_change_amount(self):
+        """ update amount_2nd_currency
+        """
+        self.on_change_rate_2nd_currency()
+
+    @fields.depends('booktransf', '_parent_booktransf.currency', \
+        'currency', 'amount', 'amount_2nd_currency', 'rate_2nd_currency')
+    def on_change_booktransf(self):
+        """ update amount_2nd_currency
+        """
+        Currency = Pool().get('currency.currency')
+
+        if self.booktransf:
+            if self.currency:
+                if self.amount is not None:
+                    if self.booktransf.currency.id != self.currency.id:
+                        self.amount_2nd_currency = Currency.compute(
+                            self.currency,
+                            self.amount,
+                            self.booktransf.currency
+                            )
+                        self.rate_2nd_currency = self.on_change_with_rate_2nd_currency()
+                        return
+        self.amount_2nd_currency = None
+
+    @fields.depends('currency', 'booktransf', '_parent_booktransf.currency', \
+        'amount', 'amount_2nd_currency', 'rate_2nd_currency')
+    def on_change_rate_2nd_currency(self):
+        """ update amount_2nd_currency by rate
+        """
+        if (self.amount is None) or (self.rate_2nd_currency is None):
+            return
+        if self.currency:
+            if self.booktransf:
+                if self.currency.id != self.booktransf.currency.id:
+                    self.amount_2nd_currency = self.booktransf.currency.round(
+                            self.amount * self.rate_2nd_currency
+                        )
+
+    @classmethod
+    def set_rate_2nd_currency(cls, lines, name, value):
+        """ compute amount_2nd_currency, write to db
+        """
+        Line2 = Pool().get('cashbook.line')
+
+        to_write = []
+
+        if not name == 'rate_2nd_currency':
+            return
+
+        for line in lines:
+            if line.booktransf is None:
+                continue
+
+            if line.cashbook.currency.id == line.booktransf.currency.id:
+                continue
+
+            to_write.extend([
+                [line],
+                {
+                    'amount_2nd_currency': line.booktransf.currency.round(
+                        line.amount * value),
+                }])
+
+        if len(to_write) > 0:
+            Line2.write(*to_write)
+
+    @fields.depends('amount', 'amount_2nd_currency', 'currency2nd')
+    def on_change_with_rate_2nd_currency(self, name=None):
+        """ get current rate from amount
+        """
+        Rate =  Pool().get('currency.currency.rate')
+
+        if (self.amount is not None) and \
+            (self.amount_2nd_currency is not None) and \
+            (self.currency2nd is not None):
+            if self.amount != Decimal('0.0'):
+                exp = Decimal(Decimal(1) / 10 ** Rate.rate.digits[1])
+                return (self.amount_2nd_currency / self.amount).quantize(exp)
+
     @fields.depends('description')
     def on_change_with_descr_short(self, name=None):
         """ to speed up list-view
@@ -613,6 +717,24 @@ class Line(Workflow, ModelSQL, ModelView):
         else:
             return 2
 
+    @fields.depends('currency', 'booktransf', '_parent_booktransf.currency')
+    def on_change_with_currency2nd(self, name=None):
+        """ currency of transfer-target
+        """
+        if self.booktransf:
+            if self.currency:
+                if self.currency.id != self.booktransf.currency.id:
+                    return self.booktransf.currency.id
+
+    @fields.depends('currency', 'booktransf', '_parent_booktransf.currency')
+    def on_change_with_currency2nd_digits(self, name=None):
+        """ currency of transfer-target
+        """
+        if self.booktransf:
+            return self.booktransf.currency.digits
+        else:
+            return 2
+
     @fields.depends('id', 'date', 'cashbook', \
         '_parent_cashbook.id', 'reconciliation', \
         '_parent_reconciliation.start_amount',\
@@ -734,6 +856,33 @@ class Line(Workflow, ModelSQL, ModelView):
                     raise ValueError('invalid "bookingtype"')
         return {}
 
+    @classmethod
+    def add_2nd_currency(cls, values):
+        """ add second currency amount if missing
+        """
+        pool = Pool()
+        Currency = pool.get('currency.currency')
+        Cashbook = pool.get('cashbook.book')
+
+        cashbook = values.get('cashbook', None)
+        booktransf = values.get('booktransf', None)
+        amount = values.get('amount', None)
+        amount_2nd_currency = values.get('amount_2nd_currency', None)
+
+        if cashbook:
+            if booktransf:
+                if amount is not None:
+                    if amount_2nd_currency is None:
+                        cashbook = Cashbook(cashbook)
+                        booktransf = Cashbook(booktransf)
+                        if cashbook.currency.id != booktransf.currency.id:
+                            values['amount_2nd_currency'] = Currency.compute(
+                                cashbook.currency,
+                                amount,
+                                booktransf.currency,
+                                )
+        return values
+
     @classmethod
     def update_amount_by_splitlines(cls, lines):
         """ update amounts from split-lines
@@ -862,6 +1011,7 @@ class Line(Workflow, ModelSQL, ModelView):
         for values in vlist:
             values.update(cls.get_debit_credit(values))
             values.update(cls.clear_by_bookingtype(values))
+            values.update(cls.add_2nd_currency(values))
 
             # deny add to reconciliation if state is not 'check' or 'done'
             if values.get('reconciliation', None):
diff --git a/locale/de.po b/locale/de.po
index 3fac21d..3c4a5ac 100644
--- a/locale/de.po
+++ b/locale/de.po
@@ -898,6 +898,26 @@ msgctxt "help:cashbook.line,splitlines:"
 msgid "Rows with different categories form the total sum of the booking"
 msgstr "Zeilen mit unterschiedlichen Kategorien bilden die Gesamtsumme der Buchung"
 
+msgctxt "field:cashbook.line,currency2nd:"
+msgid "2nd Currency"
+msgstr "Fremdwährung"
+
+msgctxt "field:cashbook.line,currency2nd_digits:"
+msgid "2nd Currency Digits"
+msgstr "Nachkommastellen Fremdwährung"
+
+msgctxt "field:cashbook.line,amount_2nd_currency:"
+msgid "Amount Second Currency"
+msgstr "Fremdwährungsbetrag"
+
+msgctxt "field:cashbook.line,rate_2nd_currency:"
+msgid "Rate"
+msgstr "Kurs"
+
+msgctxt "help:cashbook.line,rate_2nd_currency:"
+msgid "Exchange rate between the currencies of the participating cashbooks."
+msgstr "Wechselkurs zwischen der Währungen der beteiligten Kassenbücher."
+
 
 #################
 # cashbook.type #
diff --git a/locale/en.po b/locale/en.po
index dcea347..518714b 100644
--- a/locale/en.po
+++ b/locale/en.po
@@ -854,6 +854,26 @@ msgctxt "help:cashbook.line,splitlines:"
 msgid "Rows with different categories form the total sum of the booking"
 msgstr "Rows with different categories form the total sum of the booking"
 
+msgctxt "field:cashbook.line,currency2nd:"
+msgid "2nd Currency"
+msgstr "2nd Currency"
+
+msgctxt "field:cashbook.line,currency2nd_digits:"
+msgid "2nd Currency Digits"
+msgstr "2nd Currency Digits"
+
+msgctxt "field:cashbook.line,amount_2nd_currency:"
+msgid "Amount Second Currency"
+msgstr "Amount Second Currency"
+
+msgctxt "field:cashbook.line,rate_2nd_currency:"
+msgid "Rate"
+msgstr "Rate"
+
+msgctxt "help:cashbook.line,rate_2nd_currency:"
+msgid "Exchange rate between the currencies of the participating cashbooks."
+msgstr "Exchange rate between the currencies of the participating cashbooks."
+
 msgctxt "model:cashbook.type,name:"
 msgid "Cashbook Type"
 msgstr "Cashbook Type"
diff --git a/tests/test_line.py b/tests/test_line.py
index 450fc9c..f1a2463 100644
--- a/tests/test_line.py
+++ b/tests/test_line.py
@@ -16,6 +16,111 @@ class LineTestCase(ModuleTestCase):
     'Test cashbook line module'
     module = 'cashbook'
 
+    @with_transaction()
+    def test_line_check_add_amount2nd_currency(self):
+        """ create cashbook, lines, add transfer without
+            amount_2nd_currency
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Lines = pool.get('cashbook.line')
+
+        types = self.prep_type()
+        company = self.prep_company()
+
+        # add EURO, set company-currency to EURO
+        (usd, euro) = self.prep_2nd_currency(company)
+
+        books = Book.create([{
+            'name': 'Book USD',
+            'btype': types.id,
+            'company': company.id,
+            'currency': usd.id,
+            'number_sequ': self.prep_sequence().id,
+            'start_date': date(2022, 5, 1),
+            }, {
+            'name': 'Book EURO',
+            'btype': types.id,
+            'company': company.id,
+            'currency': euro.id,
+            'number_sequ': self.prep_sequence().id,
+            'start_date': date(2022, 5, 1),
+            }])
+        self.assertEqual(len(books), 2)
+        self.assertEqual(books[0].rec_name, 'Book USD | 0.00 usd | Open')
+        self.assertEqual(books[1].rec_name, 'Book EURO | 0.00 € | Open')
+
+        Book.write(*[
+            [books[0]],
+            {
+                'lines': [('create', [{
+                        'date': date(2022, 5, 5),
+                        'description': 'Transfer USD --> EUR',
+                        'bookingtype': 'mvout',
+                        'amount': Decimal('10.0'),
+                        'booktransf': books[1].id,
+                    }])],
+            }])
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/05/2022|to|-10.00 usd|Transfer USD --> EUR [Book EURO | 0.00 € | Open]')
+        self.assertEqual(books[0].lines[0].amount, Decimal('10.0'))
+        # auto-created
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('9.52'))
+        self.assertEqual(books[0].lines[0].rate_2nd_currency, Decimal('0.952'))
+
+        Lines.delete(books[0].lines)
+
+        Book.write(*[
+            [books[0]],
+            {
+                'lines': [('create', [{
+                        'date': date(2022, 5, 5),
+                        'description': 'Transfer USD --> EUR',
+                        'bookingtype': 'mvout',
+                        'amount': Decimal('10.0'),
+                        'booktransf': books[1].id,
+                        'amount_2nd_currency': Decimal('8.5'),
+                    }])],
+            }])
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/05/2022|to|-10.00 usd|Transfer USD --> EUR [Book EURO | 0.00 € | Open]')
+        self.assertEqual(books[0].lines[0].amount, Decimal('10.0'))
+        # manual set
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('8.5'))
+        self.assertEqual(books[0].lines[0].rate_2nd_currency, Decimal('0.85'))
+
+        # update rate to get new amount_2nd_currency
+        Lines.write(*[
+            [books[0].lines[0]],
+            {
+                'rate_2nd_currency': Decimal('0.9'),
+            }])
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('9.0'))
+
+        # update amount, rate, amount_2nd_currency
+        self.assertEqual(books[0].lines[0].rate_2nd_currency, Decimal('0.9'))
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('9.0'))
+        self.assertEqual(books[0].lines[0].amount, Decimal('10.0'))
+
+        books[0].lines[0].amount = Decimal('12.0')
+        books[0].lines[0].on_change_amount()
+        self.assertEqual(books[0].lines[0].rate_2nd_currency, Decimal('0.9'))
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('10.8'))
+        self.assertEqual(books[0].lines[0].amount, Decimal('12.0'))
+
+        books[0].lines[0].rate_2nd_currency = Decimal('0.95')
+        books[0].lines[0].on_change_rate_2nd_currency()
+        self.assertEqual(books[0].lines[0].rate_2nd_currency, Decimal('0.95'))
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('11.4'))
+        self.assertEqual(books[0].lines[0].amount, Decimal('12.0'))
+
+        books[0].lines[0].amount_2nd_currency = Decimal('10.5')
+        self.assertEqual(books[0].lines[0].on_change_with_rate_2nd_currency(), Decimal('0.875'))
+        self.assertEqual(books[0].lines[0].amount_2nd_currency, Decimal('10.5'))
+        self.assertEqual(books[0].lines[0].amount, Decimal('12.0'))
+
     @with_transaction()
     def test_line_check_transfer_2nd_currency_out(self):
         """ create cashbook, lines, transfer amount between
diff --git a/view/line_form.xml b/view/line_form.xml
index acae914..6fb4045 100644
--- a/view/line_form.xml
+++ b/view/line_form.xml
@@ -34,10 +34,17 @@ full copyright notices and license terms. -->
     <label name="category"/>
     <field name="category"/>
     <newline/>
+
     <label name="booktransf"/>
     <field name="booktransf"/>
     <newline/>
 
+    <label name="amount_2nd_currency"/>
+    <field name="amount_2nd_currency" symbol="currency2nd"/>
+    <label name="rate_2nd_currency"/>
+    <field name="rate_2nd_currency"/>
+    <newline/>
+
     <notebook colspan="6">
         <page name="splitlines" col="1" string="Split booking lines">
             <field name="splitlines"/>