# Buggy code
def init_plotscript(config):
    """
    Initialize objects needed for plotting
    :return: Dict with tickers, trades and pairs
    """

    if "pairs" in config:
        pairs = config["pairs"]
    else:
        pairs = config["exchange"]["pair_whitelist"]

    # Set timerange to use
    timerange = TimeRange.parse_timerange(config.get("timerange"))

    tickers = history.load_data(
        datadir=config.get("datadir"),
        pairs=pairs,
        timeframe=config.get("ticker_interval", "5m"),
        timerange=timerange,
    )

    trades = load_trades(
        config["trade_source"],
        db_url=config.get("db_url"),
        exportfilename=config.get("exportfilename"),
    )
    trades = history.trim_dataframe(trades, timerange, "open_time")
    return {
        "tickers": tickers,
        "trades": trades,
        "pairs": pairs,
    }


# Traceback (Exception)
2020-02-20 22:47:28,025 - freqtrade - ERROR - Fatal exception!
Traceback (most recent call last):
File "/opt/tradebot/freqtrade/.env/lib/python3.7/site-packages/talib/__init__.py", line 20, in wrapper
for arg in chain(args, kwargs.values())
StopIteration

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/freqtrade/freqtrade/main.py", line 36, in main
return_code = args['func'](args)
File "/freqtrade/freqtrade/commands/optimize_commands.py", line 76, in start_hyperopt
hyperopt.start()
File "/freqtrade/freqtrade/optimize/hyperopt.py", line 488, in start
preprocessed = self.backtesting.strategy.tickerdata_to_dataframe(data)
File "/freqtrade/freqtrade/strategy/interface.py", line 448, in tickerdata_to_dataframe
for pair, pair_data in tickerdata.items()}
File "/freqtrade/freqtrade/strategy/interface.py", line 448, in <dictcomp>
for pair, pair_data in tickerdata.items()}
File "/freqtrade/freqtrade/strategy/interface.py", line 464, in advise_indicators
return self.populate_indicators(dataframe, metadata)
File "/freqtrade/user_data/strategies/MyDev.py", line 205, in populate_indicators
dataframe['mfi'] = ta.MFI(dataframe)
File "talib/_abstract.pxi", line 352, in talib._ta_lib.Function.__call__
File "talib/_abstract.pxi", line 383, in talib._ta_lib.Function.__call_function
File "/opt/tradebot/freqtrade/.env/lib/python3.7/site-packages/talib/__init__.py", line 24, in wrapper
return func(*args, **kwargs)
File "talib/_func.pxi", line 8454, in talib._ta_lib.MFI
Exception: volume is not double

# Fixed code
def init_plotscript(config):
    """
    Initialize objects needed for plotting
    :return: Dict with tickers, trades and pairs
    """

    if "pairs" in config:
        pairs = config["pairs"]
    else:
        pairs = config["exchange"]["pair_whitelist"]

    # Set timerange to use
    timerange = TimeRange.parse_timerange(config.get("timerange"))

    tickers = load_data(
        datadir=config.get("datadir"),
        pairs=pairs,
        timeframe=config.get("ticker_interval", "5m"),
        timerange=timerange,
        data_format=config.get("dataformat_ohlcv", "json"),
    )

    trades = load_trades(
        config["trade_source"],
        db_url=config.get("db_url"),
        exportfilename=config.get("exportfilename"),
    )
    trades = trim_dataframe(trades, timerange, "open_time")
    return {
        "tickers": tickers,
        "trades": trades,
        "pairs": pairs,
    }