Major issue in the MultiCrypto_Trading.ipynb: Changing the train time interval doesn't change the test results

[mhdmyz]

There's a major issue in the MultiCrypto_Trading.ipynb! Changing the train time interval doesn't change the test results! For example in the original MultiCrypto_Trading.ipynb no matter what TRAIN_START_DATE and TRAIN_END_DATE you set, you'll get episode_return = 1.0837542090641283!