diff --git a/freqtrade/constants.py b/freqtrade/constants.py
index 7731ea610..48b8963e9 100644
--- a/freqtrade/constants.py
+++ b/freqtrade/constants.py
@@ -40,7 +40,8 @@ CONF_SCHEMA = {
                                                              'KRW', 'MXN', 'MYR', 'NOK',
                                                              'NZD', 'PHP', 'PKR', 'PLN',
                                                              'RUB', 'SEK', 'SGD', 'THB',
-                                                             'TRY', 'TWD', 'ZAR', 'USD']},
+                                                             'TRY', 'TWD', 'ZAR', 'USD',
+                                                             'USDT']},
         'dry_run': {'type': 'boolean'},
         'minimal_roi': {
             'type': 'object',
diff --git a/freqtrade/optimize/__init__.py b/freqtrade/optimize/__init__.py
index f6f1ba47a..9710fd625 100644
--- a/freqtrade/optimize/__init__.py
+++ b/freqtrade/optimize/__init__.py
@@ -74,12 +74,11 @@ def load_tickerdata_file(
             pairdata = json.load(tickerdata)
     else:
         return None
-
+    
     if timerange:
         pairdata = trim_tickerlist(pairdata, timerange)
     return pairdata
 
-
 def load_data(datadir: str,
               ticker_interval: str,
               pairs: Optional[List[str]] = None,