diff --git a/exchange_wrapper.py b/exchange_wrapper.py
index 69ff0d9..88ad781 100755
--- a/exchange_wrapper.py
+++ b/exchange_wrapper.py
@@ -95,7 +95,7 @@ class Broker:
         return 0
 
 
-    def get_symbol(self,pair):
+    def get_symbol(self,pair: str):
         if "/" in pair:
             return pair
         for item in self.markets:
@@ -118,7 +118,7 @@ class Broker:
         return {}            
 
 
-    def validate_market(self,symbol):
+    def validate_market(self,symbol:str):
         '''
         Checks that the market for the symbol exists, that it's a spot market and that it's active.
         Returns True if the market is valid, False otherwise.
@@ -144,7 +144,7 @@ class Broker:
             return 1
 
     
-    def get_trades_timestamps(self,pair,timespan,no_retries=False):
+    def get_trades_timestamps(self,pair:str ,timespan:int,no_retries=False):
         '''
         Returns the timestamps of the last trades from the database for the boosting algorithm
         '''
@@ -314,8 +314,9 @@ class Broker:
 
     def remove_pair_from_config(self, pair: str):
         try:
-            if pair in self.broker_config["pairs"]:
-                self.broker_config["pairs"].remove(pair.replace("/",""))
+            symbol = pair.replace("/","")
+            if symbol in self.broker_config["pairs"]:
+                self.broker_config["pairs"].remove(symbol)
                 return 0
             self.logger.log_this("Pair does not exist - Can't remove from read_config",1,pair)
             return 2
@@ -359,7 +360,7 @@ class Broker:
             return 1
     
     
-    def get_order_book(self,symbol,no_retries=False):
+    def get_order_book(self,symbol: str,no_retries=False):
         '''
         Returns the complete orderbook
         '''