implement get_ticker as wrapper around get_orderbook

freqtrade/exchange/__init__.py

@@ -85,6 +85,10 @@ def get_balance(currency: str) -> float:
     return EXCHANGE.get_balance(currency)
 
 
+def get_ticker(pair: str) -> Dict[str, float]:
+    return EXCHANGE.get_ticker(pair)
+
+
 def get_orderbook(pair: str, top_most: Optional[int] = None) -> Dict[str, List[Dict]]:
     return EXCHANGE.get_orderbook(pair, top_most)
 

freqtrade/exchange/bittrex.py

@@ -69,6 +69,13 @@ class Bittrex(Exchange):
             raise RuntimeError('{}: {}'.format(self.name.upper(), data['message']))
         return float(data['result']['Balance'] or 0.0)
 
+    def get_ticker(self, pair: str) -> Dict[str, float]:
+        data = self.get_orderbook(pair, top_most=1)
+        return {
+            'bid': data['bid'][0]['Rate'],
+            'ask': data['ask'][0]['Rate'],
+        }
+
     def get_orderbook(self, pair: str, top_most: Optional[int] = None) -> Dict[str, List[Dict]]:
         data = _API.get_orderbook(pair.replace('_', '-'))
         if not data['success']:

freqtrade/exchange/interface.py

@@ -49,6 +49,17 @@ class Exchange(ABC):
         :return: float
         """
 
+    @abstractmethod
+    def get_ticker(self, pair: str) -> Dict[str, float]:
+        """
+        Gets ticker for given pair.
+        :param pair: Pair as str, format: BTC_ETC
+        :return: dict, format: {
+            'bid': float,
+            'ask': float
+        }
+        """
+
     @abstractmethod
     def get_orderbook(self, pair: str, top_most: Optional[int] = None) -> Dict[str, List[Dict]]:
         """