freqtrade_origin/freqtrade/data/btanalysis.py

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"""
Helpers when analyzing backtest data
"""
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import logging
from copy import copy
from datetime import datetime, timezone
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from pathlib import Path
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from typing import Any, Dict, List, Optional, Union
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import numpy as np
import pandas as pd
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from freqtrade.constants import LAST_BT_RESULT_FN
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from freqtrade.exceptions import OperationalException
from freqtrade.misc import json_load
from freqtrade.optimize.backtest_caching import get_backtest_metadata_filename
from freqtrade.persistence import LocalTrade, Trade, init_db
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logger = logging.getLogger(__name__)
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# Newest format
BT_DATA_COLUMNS = ['pair', 'stake_amount', 'amount', 'open_date', 'close_date',
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'open_rate', 'close_rate',
'fee_open', 'fee_close', 'trade_duration',
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'profit_ratio', 'profit_abs', 'exit_reason',
'initial_stop_loss_abs', 'initial_stop_loss_ratio', 'stop_loss_abs',
'stop_loss_ratio', 'min_rate', 'max_rate', 'is_open', 'enter_tag',
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'is_short'
]
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def get_latest_optimize_filename(directory: Union[Path, str], variant: str) -> str:
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"""
Get latest backtest export based on '.last_result.json'.
:param directory: Directory to search for last result
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:param variant: 'backtest' or 'hyperopt' - the method to return
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:return: string containing the filename of the latest backtest result
:raises: ValueError in the following cases:
* Directory does not exist
* `directory/.last_result.json` does not exist
* `directory/.last_result.json` has the wrong content
"""
if isinstance(directory, str):
directory = Path(directory)
if not directory.is_dir():
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raise ValueError(f"Directory '{directory}' does not exist.")
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filename = directory / LAST_BT_RESULT_FN
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if not filename.is_file():
raise ValueError(
f"Directory '{directory}' does not seem to contain backtest statistics yet.")
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with filename.open() as file:
data = json_load(file)
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if f'latest_{variant}' not in data:
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raise ValueError(f"Invalid '{LAST_BT_RESULT_FN}' format.")
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return data[f'latest_{variant}']
def get_latest_backtest_filename(directory: Union[Path, str]) -> str:
"""
Get latest backtest export based on '.last_result.json'.
:param directory: Directory to search for last result
:return: string containing the filename of the latest backtest result
:raises: ValueError in the following cases:
* Directory does not exist
* `directory/.last_result.json` does not exist
* `directory/.last_result.json` has the wrong content
"""
return get_latest_optimize_filename(directory, 'backtest')
def get_latest_hyperopt_filename(directory: Union[Path, str]) -> str:
"""
Get latest hyperopt export based on '.last_result.json'.
:param directory: Directory to search for last result
:return: string containing the filename of the latest hyperopt result
:raises: ValueError in the following cases:
* Directory does not exist
* `directory/.last_result.json` does not exist
* `directory/.last_result.json` has the wrong content
"""
try:
return get_latest_optimize_filename(directory, 'hyperopt')
except ValueError:
# Return default (legacy) pickle filename
return 'hyperopt_results.pickle'
def get_latest_hyperopt_file(directory: Union[Path, str], predef_filename: str = None) -> Path:
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"""
Get latest hyperopt export based on '.last_result.json'.
:param directory: Directory to search for last result
:return: string containing the filename of the latest hyperopt result
:raises: ValueError in the following cases:
* Directory does not exist
* `directory/.last_result.json` does not exist
* `directory/.last_result.json` has the wrong content
"""
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if isinstance(directory, str):
directory = Path(directory)
if predef_filename:
if Path(predef_filename).is_absolute():
raise OperationalException(
"--hyperopt-filename expects only the filename, not an absolute path.")
return directory / predef_filename
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return directory / get_latest_hyperopt_filename(directory)
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def load_backtest_metadata(filename: Union[Path, str]) -> Dict[str, Any]:
"""
Read metadata dictionary from backtest results file without reading and deserializing entire
file.
:param filename: path to backtest results file.
:return: metadata dict or None if metadata is not present.
"""
filename = get_backtest_metadata_filename(filename)
try:
with filename.open() as fp:
return json_load(fp)
except FileNotFoundError:
return {}
except Exception as e:
raise OperationalException('Unexpected error while loading backtest metadata.') from e
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def load_backtest_stats(filename: Union[Path, str]) -> Dict[str, Any]:
"""
Load backtest statistics file.
:param filename: pathlib.Path object, or string pointing to the file.
:return: a dictionary containing the resulting file.
"""
if isinstance(filename, str):
filename = Path(filename)
if filename.is_dir():
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filename = filename / get_latest_backtest_filename(filename)
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if not filename.is_file():
raise ValueError(f"File {filename} does not exist.")
logger.info(f"Loading backtest result from {filename}")
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with filename.open() as file:
data = json_load(file)
# Legacy list format does not contain metadata.
if isinstance(data, dict):
data['metadata'] = load_backtest_metadata(filename)
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return data
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def load_and_merge_backtest_result(strategy_name: str, filename: Path, results: Dict[str, Any]):
"""
Load one strategy from multi-strategy result
and merge it with results
:param strategy_name: Name of the strategy contained in the result
:param filename: Backtest-result-filename to load
:param results: dict to merge the result to.
"""
bt_data = load_backtest_stats(filename)
for k in ('metadata', 'strategy'):
results[k][strategy_name] = bt_data[k][strategy_name]
comparison = bt_data['strategy_comparison']
for i in range(len(comparison)):
if comparison[i]['key'] == strategy_name:
results['strategy_comparison'].append(comparison[i])
break
def _get_backtest_files(dirname: Path) -> List[Path]:
return list(reversed(sorted(dirname.glob('backtest-result-*-[0-9][0-9].json'))))
def get_backtest_resultlist(dirname: Path):
"""
Get list of backtest results read from metadata files
"""
results = []
for filename in _get_backtest_files(dirname):
metadata = load_backtest_metadata(filename)
if not metadata:
continue
for s, v in metadata.items():
results.append({
'filename': filename.name,
'strategy': s,
'run_id': v['run_id'],
'backtest_start_time': v['backtest_start_time'],
})
return results
def find_existing_backtest_stats(dirname: Union[Path, str], run_ids: Dict[str, str],
min_backtest_date: datetime = None) -> Dict[str, Any]:
"""
Find existing backtest stats that match specified run IDs and load them.
:param dirname: pathlib.Path object, or string pointing to the file.
:param run_ids: {strategy_name: id_string} dictionary.
:param min_backtest_date: do not load a backtest older than specified date.
:return: results dict.
"""
# Copy so we can modify this dict without affecting parent scope.
run_ids = copy(run_ids)
dirname = Path(dirname)
results: Dict[str, Any] = {
'metadata': {},
'strategy': {},
'strategy_comparison': [],
}
# Weird glob expression here avoids including .meta.json files.
for filename in _get_backtest_files(dirname):
metadata = load_backtest_metadata(filename)
if not metadata:
# Files are sorted from newest to oldest. When file without metadata is encountered it
# is safe to assume older files will also not have any metadata.
break
for strategy_name, run_id in list(run_ids.items()):
strategy_metadata = metadata.get(strategy_name, None)
if not strategy_metadata:
# This strategy is not present in analyzed backtest.
continue
if min_backtest_date is not None:
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backtest_date = strategy_metadata['backtest_start_time']
backtest_date = datetime.fromtimestamp(backtest_date, tz=timezone.utc)
if backtest_date < min_backtest_date:
# Do not use a cached result for this strategy as first result is too old.
del run_ids[strategy_name]
continue
if strategy_metadata['run_id'] == run_id:
del run_ids[strategy_name]
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load_and_merge_backtest_result(strategy_name, filename, results)
if len(run_ids) == 0:
break
return results
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def load_backtest_data(filename: Union[Path, str], strategy: Optional[str] = None) -> pd.DataFrame:
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"""
Load backtest data file.
:param filename: pathlib.Path object, or string pointing to a file or directory
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:param strategy: Strategy to load - mainly relevant for multi-strategy backtests
Can also serve as protection to load the correct result.
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:return: a dataframe with the analysis results
:raise: ValueError if loading goes wrong.
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"""
data = load_backtest_stats(filename)
if not isinstance(data, list):
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# new, nested format
if 'strategy' not in data:
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raise ValueError("Unknown dataformat.")
if not strategy:
if len(data['strategy']) == 1:
strategy = list(data['strategy'].keys())[0]
else:
raise ValueError("Detected backtest result with more than one strategy. "
"Please specify a strategy.")
if strategy not in data['strategy']:
raise ValueError(f"Strategy {strategy} not available in the backtest result.")
data = data['strategy'][strategy]['trades']
df = pd.DataFrame(data)
if not df.empty:
df['open_date'] = pd.to_datetime(df['open_date'],
utc=True,
infer_datetime_format=True
)
df['close_date'] = pd.to_datetime(df['close_date'],
utc=True,
infer_datetime_format=True
)
# Compatibility support for pre short Columns
if 'is_short' not in df.columns:
df['is_short'] = 0
if 'enter_tag' not in df.columns:
df['enter_tag'] = df['buy_tag']
df = df.drop(['buy_tag'], axis=1)
else:
# old format - only with lists.
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raise OperationalException(
"Backtest-results with only trades data are no longer supported.")
if not df.empty:
df = df.sort_values("open_date").reset_index(drop=True)
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return df
def analyze_trade_parallelism(results: pd.DataFrame, timeframe: str) -> pd.DataFrame:
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"""
Find overlapping trades by expanding each trade once per period it was open
and then counting overlaps.
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:param results: Results Dataframe - can be loaded
:param timeframe: Timeframe used for backtest
:return: dataframe with open-counts per time-period in timeframe
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"""
from freqtrade.exchange import timeframe_to_minutes
timeframe_min = timeframe_to_minutes(timeframe)
dates = [pd.Series(pd.date_range(row[1]['open_date'], row[1]['close_date'],
freq=f"{timeframe_min}min"))
for row in results[['open_date', 'close_date']].iterrows()]
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deltas = [len(x) for x in dates]
dates = pd.Series(pd.concat(dates).values, name='date')
df2 = pd.DataFrame(np.repeat(results.values, deltas, axis=0), columns=results.columns)
df2 = pd.concat([dates, df2], axis=1)
df2 = df2.set_index('date')
df_final = df2.resample(f"{timeframe_min}min")[['pair']].count()
df_final = df_final.rename({'pair': 'open_trades'}, axis=1)
return df_final
def evaluate_result_multi(results: pd.DataFrame, timeframe: str,
max_open_trades: int) -> pd.DataFrame:
"""
Find overlapping trades by expanding each trade once per period it was open
and then counting overlaps
:param results: Results Dataframe - can be loaded
:param timeframe: Frequency used for the backtest
:param max_open_trades: parameter max_open_trades used during backtest run
:return: dataframe with open-counts per time-period in freq
"""
df_final = analyze_trade_parallelism(results, timeframe)
return df_final[df_final['open_trades'] > max_open_trades]
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def trade_list_to_dataframe(trades: List[LocalTrade]) -> pd.DataFrame:
"""
Convert list of Trade objects to pandas Dataframe
:param trades: List of trade objects
:return: Dataframe with BT_DATA_COLUMNS
"""
df = pd.DataFrame.from_records([t.to_json() for t in trades], columns=BT_DATA_COLUMNS)
if len(df) > 0:
df.loc[:, 'close_date'] = pd.to_datetime(df['close_date'], utc=True)
df.loc[:, 'open_date'] = pd.to_datetime(df['open_date'], utc=True)
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df.loc[:, 'close_rate'] = df['close_rate'].astype('float64')
return df
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def load_trades_from_db(db_url: str, strategy: Optional[str] = None) -> pd.DataFrame:
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"""
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Load trades from a DB (using dburl)
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:param db_url: Sqlite url (default format sqlite:///tradesv3.dry-run.sqlite)
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:param strategy: Strategy to load - mainly relevant for multi-strategy backtests
Can also serve as protection to load the correct result.
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:return: Dataframe containing Trades
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"""
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init_db(db_url)
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filters = []
if strategy:
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filters.append(Trade.strategy == strategy)
trades = trade_list_to_dataframe(Trade.get_trades(filters).all())
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return trades
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def load_trades(source: str, db_url: str, exportfilename: Path,
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no_trades: bool = False, strategy: Optional[str] = None) -> pd.DataFrame:
"""
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Based on configuration option 'trade_source':
* loads data from DB (using `db_url`)
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* loads data from backtestfile (using `exportfilename`)
:param source: "DB" or "file" - specify source to load from
:param db_url: sqlalchemy formatted url to a database
:param exportfilename: Json file generated by backtesting
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:param no_trades: Skip using trades, only return backtesting data columns
:return: DataFrame containing trades
"""
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if no_trades:
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df = pd.DataFrame(columns=BT_DATA_COLUMNS)
return df
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if source == "DB":
return load_trades_from_db(db_url)
elif source == "file":
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return load_backtest_data(exportfilename, strategy)
def extract_trades_of_period(dataframe: pd.DataFrame, trades: pd.DataFrame,
date_index=False) -> pd.DataFrame:
"""
Compare trades and backtested pair DataFrames to get trades performed on backtested period
:return: the DataFrame of a trades of period
"""
if date_index:
trades_start = dataframe.index[0]
trades_stop = dataframe.index[-1]
else:
trades_start = dataframe.iloc[0]['date']
trades_stop = dataframe.iloc[-1]['date']
trades = trades.loc[(trades['open_date'] >= trades_start) &
(trades['close_date'] <= trades_stop)]
return trades