def METHOD_NAME(
    data: Union[pd.Series, pd.DataFrame],
    target_column: str = "close",
    seasonal_periods: int = 7,
    n_predict: int = 5,
    start_window: float = 0.85,
    forecast_horizon: int = 5,
) -> Tuple[
    Optional[List[TimeSeries]],
    Optional[List[TimeSeries]],
    Optional[List[TimeSeries]],
    Optional[float],
    Optional[StatsForecast],