def setup_method(self, method):
        self.easy_data = pd.DataFrame({"A": np.random.randn(10),
                                       "B": np.random.randn(10),
                                       "C": np.random.randn(10),
                                       "datetime": pd.date_range('1/1/2019', periods=10)})
        self.lookback = random.randint(1, 5)