Always use config.json if it's available

freqtrade/configuration/arguments.py

@@ -3,6 +3,7 @@ This module contains the argument manager class
 """
 import argparse
 from typing import List, Optional
+from pathlib import Path
 
 from freqtrade.configuration.cli_options import AVAILABLE_CLI_OPTIONS
 from freqtrade import constants
@@ -73,11 +74,13 @@ class Arguments(object):
         """
         parsed_arg = self.parser.parse_args(self.args)
 
+        # When no config is provided, but a config exists, use that configuration!
+
         # Workaround issue in argparse with action='append' and default value
         # (see https://bugs.python.org/issue16399)
         # Allow no-config for certain commands (like downloading / plotting)
-        if (parsed_arg.config is None
-                and not ('subparser' in parsed_arg and parsed_arg.subparser in NO_CONF_REQURIED)):
+        if (parsed_arg.config is None and ((Path.cwd() / constants.DEFAULT_CONFIG).is_file() or
+           not ('subparser' in parsed_arg and parsed_arg.subparser in NO_CONF_REQURIED))):
             parsed_arg.config = [constants.DEFAULT_CONFIG]
 
         return parsed_arg

freqtrade/tests/test_configuration.py

@@ -871,6 +871,8 @@ def test_pairlist_resolving_fallback(mocker):
     ]
 
     args = Arguments(arglist).get_parsed_arg()
+    # Fix flaky tests if config.json exists
+    args.config = None
 
     configuration = Configuration(args)
     config = configuration.get_config()