fix help string for --db-url

freqtrade/arguments.py

@@ -133,8 +133,9 @@ class Arguments(object):
         )
         parser.add_argument(
             '--db-url',
-            help=f'Override trades database URL, this is useful if dry_run is enabled '
-                 f'or in custom deployments (default: {constants.DEFAULT_DB_DRYRUN_URL}.',
+            help=f'Override trades database URL, this is useful in custom deployments '
+                 f'(default: `{constants.DEFAULT_DB_PROD_URL}` for Live Run mode, '
+                 f'`{constants.DEFAULT_DB_DRYRUN_URL}` for Dry Run).',
             dest='db_url',
             metavar='PATH',
         )