fix output if no variance, and fix docs

docs/backtesting.md

@@ -31,9 +31,9 @@ optional arguments:
                         Specify timeframe (`1m`, `5m`, `30m`, `1h`, `1d`).
   --timerange TIMERANGE
                         Specify what timerange of data to use.
-  --data-format-ohlcv {json,jsongz,hdf5}
+  --data-format-ohlcv {json,jsongz,hdf5,feather,parquet}
                         Storage format for downloaded candle (OHLCV) data.
-                        (default: `json`).
+                        (default: `feather`).
   --max-open-trades INT
                         Override the value of the `max_open_trades`
                         configuration setting.

docs/recursive-analysis.md

@@ -40,11 +40,41 @@ usage: freqtrade recursive-analysis [-h] [-v] [--logfile FILE] [-V] [-c PATH]
                                     [--startup-candle STARTUP_CANDLES [STARTUP_CANDLES ...]]
 
 optional arguments:
--p PAIR, --pairs PAIR
+  -h, --help            show this help message and exit
+  -i TIMEFRAME, --timeframe TIMEFRAME
+                        Specify timeframe (`1m`, `5m`, `30m`, `1h`, `1d`).
+  --data-format-ohlcv {json,jsongz,hdf5,feather,parquet}
+                        Storage format for downloaded candle (OHLCV) data.
+                        (default: `feather`).
+  -p PAIR, --pairs PAIR
                         Limit command to this pair.
---startup-candle STARTUP_CANDLE [STARTUP_CANDLE ...]
+  --startup-candle STARTUP_CANDLE [STARTUP_CANDLE ...]
                         Provide a space-separated list of startup_candle_count to
                         be checked. Default : `199 399 499 999 1999`.
+
+Common arguments:
+  -v, --verbose         Verbose mode (-vv for more, -vvv to get all messages).
+  --logfile FILE        Log to the file specified. Special values are:
+                        'syslog', 'journald'. See the documentation for more
+                        details.
+  -V, --version         show program's version number and exit
+  -c PATH, --config PATH
+                        Specify configuration file (default:
+                        `userdir/config.json` or `config.json` whichever
+                        exists). Multiple --config options may be used. Can be
+                        set to `-` to read config from stdin.
+  -d PATH, --datadir PATH
+                        Path to directory with historical backtesting data.
+  --userdir PATH, --user-data-dir PATH
+                        Path to userdata directory.
+
+Strategy arguments:
+  -s NAME, --strategy NAME
+                        Specify strategy class name which will be used by the
+                        bot.
+  --strategy-path PATH  Specify additional strategy lookup path.
+  --timerange TIMERANGE
+                        Specify what timerange of data to use.
 ```
 
 ### Why are odd-numbered default startup candles used?

freqtrade/optimize/analysis/recursive.py

@@ -64,7 +64,7 @@ class RecursiveAnalysis(BaseAnalysis):
                         self.dict_recursive[indicator][part.startup_candle] = f"{diff:.3f}%"
 
             else:
-                logger.info("No difference found. Stop the process.")
+                logger.info("No variance on indicator(s) found due to recursive formula.")
                 break
 
     # For lookahead bias check
@@ -100,7 +100,7 @@ class RecursiveAnalysis(BaseAnalysis):
                     # logger.info("part value {:.5f}".format(values_diff_other))
 
         else:
-            logger.info("No lookahead bias on indicators found. Stop the process.")
+            logger.info("No lookahead bias on indicators found.")
 
     def prepare_data(self, varholder: VarHolder, pairs_to_load: List[DataFrame]):
 

freqtrade/optimize/analysis/recursive_helpers.py

@@ -31,11 +31,14 @@ class RecursiveAnalysisSubFunctions:
                         temp_data.append(values.get(int(candle), '-'))
                     data.append(temp_data)
 
+        if len(data) > 0:
             from tabulate import tabulate
             table = tabulate(data, headers=headers, tablefmt="orgtbl")
             print(table)
             return table, headers, data
 
+        return None
+
     @staticmethod
     def calculate_config_overrides(config: Config):
         if 'timerange' not in config:
@@ -81,8 +84,7 @@ class RecursiveAnalysisSubFunctions:
         if not (strategy_list := config.get('strategy_list', [])):
             if config.get('strategy') is None:
                 raise OperationalException(
-                    "No Strategy specified. Please specify a strategy via --strategy or "
+                    "No Strategy specified. Please specify a strategy via --strategy"
-                    "--strategy-list"
                 )
             strategy_list = [config['strategy']]
 
@@ -101,6 +103,5 @@ class RecursiveAnalysisSubFunctions:
                 RecursiveAnalysis_instances)
         else:
             logger.error("There were no strategies specified neither through "
-                         "--strategy nor through "
+                         "--strategy "
-                         "--strategy-list "
                          "or timeframe was not specified.")