diff --git a/freqtrade/arguments.py b/freqtrade/arguments.py
index 0fa412c85..727493511 100644
--- a/freqtrade/arguments.py
+++ b/freqtrade/arguments.py
@@ -60,15 +60,15 @@ class Arguments(object):
         )
         self.parser.add_argument(
             '-c', '--config',
-            help='specify configuration file (default: config.json)',
+            help='specify configuration file (default: %(default)s)',
             dest='config',
             default='config.json',
             type=str,
             metavar='PATH',
         )
         self.parser.add_argument(
-            '--datadir',
-            help='path to backtest data (default freqdata/tests/testdata)',
+            '-d', '--datadir',
+            help='path to backtest data (default: %(default)s',
             dest='datadir',
             default=os.path.join('freqtrade', 'tests', 'testdata'),
             type=str,
@@ -76,7 +76,7 @@ class Arguments(object):
         )
         self.parser.add_argument(
             '-s', '--strategy',
-            help='specify strategy file (default: freqtrade/strategy/default_strategy.py)',
+            help='specify strategy file (default: %(default)s)',
             dest='strategy',
             default='default_strategy',
             type=str,
@@ -154,7 +154,7 @@ class Arguments(object):
         """
         parser.add_argument(
             '-e', '--epochs',
-            help='specify number of epochs (default: 100)',
+            help='specify number of epochs (default: %(default)d)',
             dest='epochs',
             default=Constants.HYPEROPT_EPOCH,
             type=int,
diff --git a/freqtrade/misc.py b/freqtrade/misc.py
index 741a306a1..55bfed1f7 100644
--- a/freqtrade/misc.py
+++ b/freqtrade/misc.py
@@ -69,3 +69,4 @@ def file_dump_json(filename, data) -> None:
     """
     with open(filename, 'w') as file:
         json.dump(data, file)
+