Fix if no file exists

freqtrade/commands/arguments.py

@@ -59,7 +59,7 @@ ARGS_DOWNLOAD_DATA = ["pairs", "pairs_file", "days", "download_trades", "exchang
 
 ARGS_PLOT_DATAFRAME = ["pairs", "indicators1", "indicators2", "plot_limit",
                        "db_url", "trade_source", "export", "exportfilename",
-                       "timerange", "ticker_interval"]
+                       "timerange", "ticker_interval", "skip_trades"]
 
 ARGS_PLOT_PROFIT = ["pairs", "timerange", "export", "exportfilename", "db_url",
                     "trade_source", "ticker_interval"]

freqtrade/commands/cli_options.py

@@ -413,6 +413,11 @@ AVAILABLE_CLI_OPTIONS = {
         metavar='INT',
         default=750,
     ),
+    "skip_trades": Arg(
+        '--skip-trades',
+        help='Skip using trades file from backtesting and DB.',
+        action='store_true',
+    ),
     "trade_source": Arg(
         '--trade-source',
         help='Specify the source for trades (Can be DB or file (backtest file)) '

freqtrade/data/btanalysis.py

@@ -129,12 +129,16 @@ def load_trades_from_db(db_url: str) -> pd.DataFrame:
     return trades
 
 
-def load_trades(source: str, db_url: str, exportfilename: str) -> pd.DataFrame:
+def load_trades(source: str, db_url: str, exportfilename: str, skip_trades: bool) -> pd.DataFrame:
     """
     Based on configuration option "trade_source":
     * loads data from DB (using `db_url`)
     * loads data from backtestfile (using `exportfilename`)
     """
+    if skip_trades:
+        df = pd.DataFrame(columns=BT_DATA_COLUMNS)
+        return df
+
     if source == "DB":
         return load_trades_from_db(db_url)
     elif source == "file":

freqtrade/plot/plotting.py

@@ -3,6 +3,7 @@ from pathlib import Path
 from typing import Any, Dict, List
 
 import pandas as pd
+from os.path import isfile
 
 from freqtrade.configuration import TimeRange
 from freqtrade.data.btanalysis import (calculate_max_drawdown,
@@ -48,11 +49,21 @@ def init_plotscript(config):
         data_format=config.get('dataformat_ohlcv', 'json'),
     )
 
-    trades = load_trades(config['trade_source'],
+    skip_trades = False
+    if not isfile(config.get('exportfilename')) and config['trade_source'] == 'file':
+        logger.info("Backtest file is missing skipping trades.")
+        skip_trades = True
+    elif config.get('skip_trades', False):
+        skip_trades = True
+
+    trades = load_trades(
+        config['trade_source'],
         db_url=config.get('db_url'),
         exportfilename=config.get('exportfilename'),
+        skip_trades=skip_trades
     )
     trades = trim_dataframe(trades, timerange, 'open_time')
+
     return {"ohlcv": data,
             "trades": trades,
             "pairs": pairs,

tests/data/test_btanalysis.py

@@ -104,6 +104,7 @@ def test_load_trades(default_conf, mocker):
     load_trades("DB",
                 db_url=default_conf.get('db_url'),
                 exportfilename=default_conf.get('exportfilename'),
+                skip_trades=False
                 )
 
     assert db_mock.call_count == 1
@@ -114,7 +115,9 @@ def test_load_trades(default_conf, mocker):
     default_conf['exportfilename'] = "testfile.json"
     load_trades("file",
                 db_url=default_conf.get('db_url'),
-                exportfilename=default_conf.get('exportfilename'),)
+                exportfilename=default_conf.get('exportfilename'),
+                skip_trades=False
+                )
 
     assert db_mock.call_count == 0
     assert bt_mock.call_count == 1