Isolated liq branch passes all tests and has the general structure that it is supposed to, but is patchy, and doesnt get the correct maintenance amt and maintenance margin rate yet

freqtrade/exchange/exchange.py

@@ -1987,7 +1987,7 @@ class Exchange:
     def get_liquidation_price(self, pair: str):
         '''
             Set's the margin mode on the exchange to cross or isolated for a specific pair
-            :param symbol: base/quote currency pair (e.g. "ADA/USDT")
+            :param pair: base/quote currency pair (e.g. "ADA/USDT")
         '''
         if self._config['dry_run'] or not self.exchange_has("fetchPositions"):
             # Some exchanges only support one collateral type
@@ -2003,6 +2003,14 @@ class Exchange:
         except ccxt.BaseError as e:
             raise OperationalException(e) from e
 
+    @retrier
+    def get_mm_amt_rate(self, pair: str, amount: float):
+        '''
+            :return: The maintenance amount, and maintenance margin rate
+        '''
+        # TODO-lev: return the real amounts
+        return 0, 0.4
+
 
 def is_exchange_known_ccxt(exchange_name: str, ccxt_module: CcxtModuleType = None) -> bool:
     return exchange_name in ccxt_exchanges(ccxt_module)