diff --git a/freqtrade/constants.py b/freqtrade/constants.py
index 4ba1a7094..d80eea6f4 100644
--- a/freqtrade/constants.py
+++ b/freqtrade/constants.py
@@ -62,7 +62,7 @@ CONF_SCHEMA = {
         },
         'stoploss': {'type': 'number', 'maximum': 0, 'exclusiveMaximum': True},
         'trailing_stop': {'type': 'boolean'},
-        'trailing_stop_positive': {'type': 'number', 'minimum': 0},
+        'trailing_stop_positive': {'type': 'number', 'minimum': 0, 'maximum': 1},
         'unfilledtimeout': {'type': 'integer', 'minimum': 0},
         'bid_strategy': {
             'type': 'object',
diff --git a/freqtrade/persistence.py b/freqtrade/persistence.py
index 2b226e53a..ad90d3f92 100644
--- a/freqtrade/persistence.py
+++ b/freqtrade/persistence.py
@@ -184,14 +184,8 @@ class Trade(_DECL_BASE):
             arrow.get(self.open_date).humanize() if self.is_open else 'closed'
         )
 
-    def adjust_stop_loss(self, current_price: float, stoploss: float, initial: bool =False):
-        """
-        this adjusts the stop loss to it's most recently observed setting
-        :param current_price:
-        :param stoploss in percent:
-        :param initial:
-        :return:
-        """
+    def adjust_stop_loss(self, current_price: float, stoploss: float, initial: bool = False):
+        """this adjusts the stop loss to it's most recently observed setting"""
 
         if initial and not (self.stop_loss is None or self.stop_loss == 0):
             # Don't modify if called with initial and nothing to do
@@ -207,7 +201,7 @@ class Trade(_DECL_BASE):
                 self.max_rate = current_price
 
         # no stop loss assigned yet
-        if self.stop_loss is None or self.stop_loss == 0:
+        if not self.stop_loss:
             logger.debug("assigning new stop loss")
             self.stop_loss = new_loss
             self.initial_stop_loss = new_loss