add --fee to change fees to other values

freqtrade/configuration/arguments.py

@@ -15,7 +15,7 @@ ARGS_STRATEGY = ["strategy", "strategy_path"]
 ARGS_MAIN = ARGS_COMMON + ARGS_STRATEGY + ["db_url", "sd_notify"]
 
 ARGS_COMMON_OPTIMIZE = ["ticker_interval", "timerange",
-                        "max_open_trades", "stake_amount"]
+                        "max_open_trades", "stake_amount", "fee"]
 
 ARGS_BACKTEST = ARGS_COMMON_OPTIMIZE + ["position_stacking", "use_max_market_positions",
                                         "strategy_list", "export", "exportfilename"]

freqtrade/configuration/cli_options.py

@@ -144,6 +144,12 @@ AVAILABLE_CLI_OPTIONS = {
         default=os.path.join('user_data', 'backtest_results',
                              'backtest-result.json'),
     ),
+    "fee": Arg(
+        '--fee',
+        help='Specify fee %%. Should be in %%, will be applied twice (on trade entry and exit).',
+        type=float,
+        metavar='FLOAT',
+    ),
     # Edge
     "stoploss_range": Arg(
         '--stoplosses',

freqtrade/configuration/configuration.py

@@ -210,6 +210,10 @@ class Configuration:
                              logstring='Parameter --stake_amount detected, '
                              'overriding stake_amount to: {} ...')
 
+        self._args_to_config(config, argname='fee',
+                             logstring='Parameter --fee detected, '
+                             'setting fee to: {} ...')
+
         self._args_to_config(config, argname='timerange',
                              logstring='Parameter --timerange detected: {} ...')
 
@@ -323,7 +327,8 @@ class Configuration:
                         sample: logfun=len (prints the length of the found
                         configuration instead of the content)
         """
-        if argname in self.args and self.args[argname]:
+        if (argname in self.args and self.args[argname] is not None
+            and self.args[argname] is not False):
 
             config.update({argname: self.args[argname]})
             if logfun:

freqtrade/edge/__init__.py

@@ -77,8 +77,10 @@ class Edge:
 
         self._timerange: TimeRange = TimeRange.parse_timerange("%s-" % arrow.now().shift(
             days=-1 * self._since_number_of_days).format('YYYYMMDD'))
-
+        if config.get('fee'):
-        self.fee = self.exchange.get_fee()
+            self.fee = config['fee']
+        else:
+            self.fee = self.exchange.get_fee()
 
     def calculate(self) -> bool:
         pairs = self.config['exchange']['pair_whitelist']

freqtrade/optimize/backtesting.py

@@ -63,9 +63,12 @@ class Backtesting:
         self.config['exchange']['uid'] = ''
         self.config['dry_run'] = True
         self.strategylist: List[IStrategy] = []
-
         self.exchange = ExchangeResolver(self.config['exchange']['name'], self.config).exchange
-        self.fee = self.exchange.get_fee()
+
+        if config.get('fee'):
+            self.fee = config['fee']
+        else:
+            self.fee = self.exchange.get_fee()
 
         if self.config.get('runmode') != RunMode.HYPEROPT:
             self.dataprovider = DataProvider(self.config, self.exchange)