diff --git a/freqtrade/arguments.py b/freqtrade/arguments.py
index 97c3d8cb2..1ae805ca5 100644
--- a/freqtrade/arguments.py
+++ b/freqtrade/arguments.py
@@ -239,17 +239,15 @@ class Arguments(object):
                 stop: Optional[int] = None
                 if stype[0]:
                     starts = rvals[index]
-                    if stype[0] == 'date':
-                        start = int(starts) if len(starts) == 10 \
-                            else arrow.get(starts, 'YYYYMMDD').timestamp
+                    if stype[0] == 'date' and len(starts) == 8:
+                        start = arrow.get(starts, 'YYYYMMDD').timestamp
                     else:
                         start = int(starts)
                     index += 1
                 if stype[1]:
                     stops = rvals[index]
-                    if stype[1] == 'date':
-                        stop = int(stops) if len(stops) == 10 \
-                            else arrow.get(stops, 'YYYYMMDD').timestamp
+                    if stype[1] == 'date' and len(stops) == 8:
+                        stop = arrow.get(stops, 'YYYYMMDD').timestamp
                     else:
                         stop = int(stops)
                 return stype, start, stop
diff --git a/freqtrade/freqtradebot.py b/freqtrade/freqtradebot.py
index b1928a4d5..49c179907 100644
--- a/freqtrade/freqtradebot.py
+++ b/freqtrade/freqtradebot.py
@@ -258,14 +258,16 @@ class FreqtradeBot(object):
 
         if stake_amount == constants.UNLIMITED_STAKE_AMOUNT:
             open_trades = len(Trade.query.filter(Trade.is_open.is_(True)).all())
-            if open_trades == self.config['max_open_trades']:
+            if open_trades >= self.config['max_open_trades']:
                 return 0
             return avaliable_amount / (self.config['max_open_trades'] - open_trades)
 
         # Check if stake_amount is fulfilled
         if avaliable_amount < stake_amount:
             raise DependencyException(
-                'stake amount is not fulfilled (currency={})'.format(self.config['stake_currency'])
+                'Available balance(%f %s) is lower than stake amount(%f %s)' % (
+                    avaliable_amount, self.config['stake_currency'],
+                    stake_amount, self.config['stake_currency'])
             )
 
         return stake_amount
diff --git a/freqtrade/tests/test_freqtradebot.py b/freqtrade/tests/test_freqtradebot.py
index d91dd4720..581e76406 100644
--- a/freqtrade/tests/test_freqtradebot.py
+++ b/freqtrade/tests/test_freqtradebot.py
@@ -301,6 +301,12 @@ def test_get_trade_stake_amount_unlimited_amount(default_conf,
     result = freqtrade._get_trade_stake_amount()
     assert(result == 0)
 
+    # set max_open_trades = 0, so do not trade
+    conf['max_open_trades'] = 0
+    freqtrade = FreqtradeBot(conf, create_engine('sqlite://'))
+    result = freqtrade._get_trade_stake_amount()
+    assert(result == 0)
+
 
 def test_create_trade_no_stake_amount(default_conf, ticker, limit_buy_order, fee, mocker) -> None:
     """