diff --git a/asset.py b/asset.py
index 0b1ef2c..f536b56 100644
--- a/asset.py
+++ b/asset.py
@@ -6,12 +6,12 @@
 from trytond.model import ModelView, ModelSQL, fields
 from trytond.transaction import Transaction
 from trytond.pool import Pool
-from trytond.pyson import Eval, Bool, And
+from trytond.pyson import Eval, Bool, And, If
 from trytond.report import Report
 from decimal import Decimal
 from datetime import time
-from sql.functions import CurrentTime, CurrentDate
-from sql.conditionals import Case
+from sql.functions import CurrentDate, CurrentTimestamp
+from sql.conditionals import Case, Coalesce
 from sql import Literal
 
 
@@ -76,9 +76,9 @@ class Asset(ModelSQL, ModelView):
         states={
             'readonly': ~Bool(Eval('updtsource')),
         }, depends=['updtsource'])
-    updtneeded = fields.Function(fields.Boolean(string='Course update needed',
+    nextupdtate = fields.Function(fields.DateTime(string='Next Update',
         readonly=True),
-        'on_change_with_updtneeded', searcher='search_updtneeded')
+        'get_nextupdtates', searcher='search_nextupdtate')
 
     # percentage change
     change_today = fields.Function(fields.Numeric(string='Previous Day',
@@ -102,6 +102,15 @@ class Asset(ModelSQL, ModelView):
         readonly=True, digits=(16,1)),
         'get_percentage_change')
 
+    @classmethod
+    def view_attributes(cls):
+        return super().view_attributes() + [
+            ('/tree', 'visual',
+                If(Eval('change_today', 0) < 0, 'warning',
+                    If(Eval('change_today', 0) > 0, 'success', '')
+                    )),
+            ]
+
     @classmethod
     def default_currency(cls):
         """ currency of company
@@ -218,8 +227,6 @@ class Asset(ModelSQL, ModelView):
 
             for name in names:
                 result[name][record[0]] = values[name]
-
-        print('-- result:', result)
         return result
 
 
@@ -320,48 +327,70 @@ class Asset(ModelSQL, ModelView):
                 if self.company.currency.id != self.currency.id:
                     return self.company.currency.id
 
-    @fields.depends('id')
-    def on_change_with_updtneeded(self, name=None):
-        """ get state of update
-        """
-        Asset2 = Pool().get('investment.asset')
-
-        if self.id:
-            if Asset2.search_count([
-                    ('updtneeded', '=', True),
-                    ('id', '=', self.id)
-                ]) == 1:
-                return True
-        return False
-
     @classmethod
-    def search_updtneeded(cls, names, clause):
-        """ search for assets to update
+    def get_next_update_datetime_sql(cls):
+        """ get sql for datetime of next planned update
         """
         pool = Pool()
-        Asset2 = pool.get('investment.asset')
+        Asset = pool.get('investment.asset')
         Rate = pool.get('investment.rate')
-        tab_asset = Asset2.__table__()
+        tab_asset = Asset.__table__()
         tab_rate = Rate.__table__()
+        context = Transaction().context
+
+        query_date = context.get('qdate', CurrentDate() - Literal(1))
+        query = tab_asset.join(tab_rate,
+                condition=tab_asset.id == tab_rate.asset,
+                type_ = 'LEFT OUTER',
+            ).select(
+                tab_asset.id,
+                ((Coalesce(tab_rate.date, query_date) + Literal(1)) + \
+                    tab_asset.updttime).as_('updttime'),
+                distinct_on = [tab_asset.id],
+                order_by = [tab_asset.id, tab_rate.date.desc],
+                where=(tab_asset.updtsource != None),
+            )
+        return query
+
+    @classmethod
+    def get_nextupdtates(cls, assets, names):
+        """ get timestamp of next update
+        """
+        Asset2 = Pool().get('investment.asset')
+        tab_updt = Asset2.get_next_update_datetime_sql()
+        cursor = Transaction().connection.cursor()
+
+        query = tab_updt.select(
+                tab_updt.id,
+                tab_updt.updttime,
+                where=tab_updt.id.in_([x.id for x in assets]),
+            )
+        cursor.execute(*query)
+        records = cursor.fetchall()
+
+        result = {x:{y.id: None for y in assets} for x in names}
+
+        for record in records:
+            (id1, updt) = record
+            r1 = {'nextupdtate': updt}
+
+            for n in names:
+                result[n][id1] = r1[n]
+        return result
+
+    @classmethod
+    def search_nextupdtate(cls, names, clause):
+        """ search for assets to update
+        """
+        Asset2 = Pool().get('investment.asset')
+        tab_updt = Asset2.get_next_update_datetime_sql()
+
         Operator = fields.SQL_OPERATORS[clause[1]]
         context = Transaction().context
 
-        query_date = context.get('qdate', CurrentDate())
-        query_time = context.get('qtime', CurrentTime())
-
-        query = tab_asset.join(tab_rate,
-                condition=(tab_asset.id==tab_rate.asset) & \
-                    (tab_rate.date == query_date),
-                type_ = 'LEFT OUTER',
-            ).select(tab_asset.id,
-                where=Operator(
-                    Case(
-                        ((tab_rate.id == None) & \
-                            (tab_asset.updtsource != None) & \
-                            (tab_asset.updttime <= query_time), True),
-                        default_ = False,
-                    ),
-                    clause[2]),
+        query = tab_updt.select(
+                tab_updt.id,
+                where=Operator(tab_updt.updttime, clause[2]),
             )
         return [('id', 'in', query)]
 
@@ -473,8 +502,9 @@ class Asset(ModelSQL, ModelView):
         Asset2 = pool.get('investment.asset')
         OnlineSource = pool.get('investment.source')
 
+        query_time = context.get('qdatetime', CurrentTimestamp())
         for asset in Asset2.search([
-                ('updtneeded', '=', True),
+                ('updttime', '<=', query_time),
             ]):
             OnlineSource.update_rate(asset)
 
diff --git a/locale/de.po b/locale/de.po
index 1a91ba8..c1a0411 100644
--- a/locale/de.po
+++ b/locale/de.po
@@ -190,9 +190,9 @@ msgctxt "field:investment.asset,updttime:"
 msgid "Time"
 msgstr "Zeitpunkt"
 
-msgctxt "field:investment.asset,updtneeded:"
-msgid "Course update needed"
-msgstr "Kursaktualisierung nötig"
+msgctxt "field:investment.asset,nextupdtate:"
+msgid "Next Update"
+msgstr "nächste Aktualisierung"
 
 msgctxt "field:investment.asset,change_today:"
 msgid "Previous Day"
diff --git a/locale/en.po b/locale/en.po
index 12bd997..2be0385 100644
--- a/locale/en.po
+++ b/locale/en.po
@@ -162,9 +162,9 @@ msgctxt "field:investment.asset,updttime:"
 msgid "Time"
 msgstr "Time"
 
-msgctxt "field:investment.asset,updtneeded:"
-msgid "Course update needed"
-msgstr "Course update needed"
+msgctxt "field:investment.asset,nextupdtate:"
+msgid "Next Update"
+msgstr "Next Update"
 
 msgctxt "field:investment.asset,change_today:"
 msgid "Previous Day"
diff --git a/tests/test_asset.py b/tests/test_asset.py
index d2928a1..a66cd51 100644
--- a/tests/test_asset.py
+++ b/tests/test_asset.py
@@ -8,7 +8,7 @@ from trytond.pool import Pool
 from trytond.modules.company.tests import create_company
 from trytond.transaction import Transaction
 from decimal import Decimal
-from datetime import time, date
+from datetime import time, date, datetime
 
 
 class AssetTestCase(ModuleTestCase):
@@ -221,31 +221,23 @@ class AssetTestCase(ModuleTestCase):
                 'updtsource': o_source.id,
                 'updttime': time(10, 45),
             }])
-        self.assertEqual(asset.updtsource.rec_name, 'Source 1')
-        self.assertEqual(asset.updttime, time(10, 45))
-        self.assertEqual(len(asset.rates), 0)
 
         with Transaction().set_context({
-            'qdate': date(2022, 10, 15),
-            'qtime': time(10, 30),
+            'qdate': date(2022, 10, 14),
             }):
             # re-read to make context work
             asset2, = Asset.browse([asset.id])
-            # no rates exists - wait for 10:45
-            self.assertEqual(asset2.updtneeded, False)
-            self.assertEqual(
-                Asset.search_count([('updtneeded', '=', True)]),
-                0)
 
-        with Transaction().set_context({
-            'qdate': date(2022, 10, 15),
-            'qtime': time(10, 46),
-            }):
-            # no rates exists - run at 10:46
-            asset2, = Asset.browse([asset.id])
-            self.assertEqual(asset2.updtneeded, True)
+            self.assertEqual(asset2.updtsource.rec_name, 'Source 1')
+            self.assertEqual(asset2.updttime, time(10, 45))
+            self.assertEqual(len(asset2.rates), 0)
+            self.assertEqual(asset2.nextupdtate, datetime(2022, 10, 15, 10, 45))
+
             self.assertEqual(
-                Asset.search_count([('updtneeded', '=', True)]),
+                Asset.search_count([('nextupdtate', '<', datetime(2022, 10, 15, 10, 45))]),
+                0)
+            self.assertEqual(
+                Asset.search_count([('nextupdtate', '>=', datetime(2022, 10, 15, 10, 45))]),
                 1)
 
         # add rate at yesterday
@@ -259,27 +251,19 @@ class AssetTestCase(ModuleTestCase):
             }])
         self.assertEqual(len(asset.rates), 1)
 
-        with Transaction().set_context({
-            'qdate': date(2022, 10, 15),
-            'qtime': time(10, 30),
-            }):
-            # 1x rate exists - run at 10:30
-            asset2, = Asset.browse([asset.id])
-            self.assertEqual(asset2.updtneeded, False)
-            self.assertEqual(
-                Asset.search_count([('updtneeded', '=', True)]),
-                0)
+        asset2, = Asset.browse([asset.id])
+        self.assertEqual(asset.updtsource.rec_name, 'Source 1')
+        self.assertEqual(asset.updttime, time(10, 45))
+        self.assertEqual(len(asset.rates), 1)
+        self.assertEqual(asset.rates[0].date, date(2022, 10, 14))
+        self.assertEqual(asset.nextupdtate, datetime(2022, 10, 15, 10, 45))
 
-        with Transaction().set_context({
-            'qdate': date(2022, 10, 15),
-            'qtime': time(10, 46),
-            }):
-            # 1x rate exists yesterday - run at 10:46
-            asset2, = Asset.browse([asset.id])
-            self.assertEqual(asset2.updtneeded, True)
-            self.assertEqual(
-                Asset.search_count([('updtneeded', '=', True)]),
-                1)
+        self.assertEqual(
+            Asset.search_count([('nextupdtate', '<', datetime(2022, 10, 15, 10, 45))]),
+            0)
+        self.assertEqual(
+            Asset.search_count([('nextupdtate', '>=', datetime(2022, 10, 15, 10, 45))]),
+            1)
 
         # add rate at today
         Asset.write(*[
@@ -292,16 +276,19 @@ class AssetTestCase(ModuleTestCase):
             }])
         self.assertEqual(len(asset.rates), 2)
 
-        with Transaction().set_context({
-            'qdate': date(2022, 10, 15),
-            'qtime': time(10, 47),
-            }):
-            # 1x rate exists today - run at 10:47
-            asset2, = Asset.browse([asset.id])
-            self.assertEqual(asset2.updtneeded, False)
-            self.assertEqual(
-                Asset.search_count([('updtneeded', '=', True)]),
-                0)
+        asset2, = Asset.browse([asset.id])
+        self.assertEqual(asset2.updtsource.rec_name, 'Source 1')
+        self.assertEqual(asset2.updttime, time(10, 45))
+        self.assertEqual(len(asset2.rates), 2)
+        self.assertEqual(asset2.rates[0].date, date(2022, 10, 15))
+        self.assertEqual(asset2.nextupdtate, datetime(2022, 10, 16, 10, 45))
+
+        self.assertEqual(
+            Asset.search_count([('nextupdtate', '<', datetime(2022, 10, 15, 10, 45))]),
+            0)
+        self.assertEqual(
+            Asset.search_count([('nextupdtate', '>=', datetime(2022, 10, 15, 10, 45))]),
+            1)
 
     @with_transaction()
     def test_asset_indentifiers(self):
diff --git a/view/asset_form.xml b/view/asset_form.xml
index a64c6a3..f3586c0 100644
--- a/view/asset_form.xml
+++ b/view/asset_form.xml
@@ -8,7 +8,9 @@ full copyright notices and license terms. -->
     <label name="rate" />
     <field name="rate" symbol="currency"/>
 
-    <label id="labdate" colspan="4" string=" "/>
+    <label id="labdate" colspan="2" string=" "/>
+    <label name="nextupdtate" />
+    <field name="nextupdtate"/>
     <label name="date" />
     <field name="date"/>