feat: add "--notes" to backtest command

closes #11847

freqtrade/commands/arguments.py

@@ -57,6 +57,7 @@ ARGS_BACKTEST = [
     "backtest_breakdown",
     "backtest_cache",
     "freqai_backtest_live_models",
+    "backtest_notes",
 ]
 
 ARGS_HYPEROPT = [

freqtrade/commands/cli_options.py

@@ -204,6 +204,11 @@ AVAILABLE_CLI_OPTIONS = {
         help="Export backtest results (default: trades).",
         choices=constants.EXPORT_OPTIONS,
     ),
+    "backtest_notes": Arg(
+        "--notes",
+        help="Add notes to the backtest results.",
+        metavar="TEXT",
+    ),
     "exportfilename": Arg(
         "--export-filename",
         "--backtest-filename",

freqtrade/configuration/configuration.py

@@ -310,6 +310,7 @@ class Configuration:
             ("backtest_cache", "Parameter --cache={} detected ..."),
             ("disableparamexport", "Parameter --disableparamexport detected: {} ..."),
             ("freqai_backtest_live_models", "Parameter --freqai-backtest-live-models detected ..."),
+            ("backtest_notes", "Parameter --notes detected: {} ..."),
         ]
         self._args_to_config_loop(config, configurations)
 

freqtrade/optimize/backtesting.py

@@ -1822,7 +1822,11 @@ class Backtesting:
         # Update old results with new ones.
         if len(self.all_bt_content) > 0:
             results = generate_backtest_stats(
-                data, self.all_bt_content, min_date=min_date, max_date=max_date
+                data,
+                self.all_bt_content,
+                min_date=min_date,
+                max_date=max_date,
+                notes=self.config.get("backtest_notes"),
             )
             if self.results:
                 self.results["metadata"].update(results["metadata"])

freqtrade/optimize/optimize_reports/optimize_reports.py

@@ -669,6 +669,7 @@ def generate_backtest_stats(
     all_results: dict[str, BacktestContentType],
     min_date: datetime,
     max_date: datetime,
+    notes: str | None = None,
 ) -> BacktestResultType:
     """
     :param btdata: Backtest data
@@ -694,6 +695,8 @@ def generate_backtest_stats(
             "backtest_start_ts": int(min_date.timestamp()),
             "backtest_end_ts": int(max_date.timestamp()),
         }
+        if notes:
+            metadata[strategy]["notes"] = notes
         result["strategy"][strategy] = strat_stats
 
     strategy_results = generate_strategy_comparison(bt_stats=result["strategy"])