(self, cwd='./envs/FinRL', gamma=0.995,
max_stock=1e2, initial_capital=1e6, buy_cost_pct=1e-3, sell_cost_pct=1e-3,
start_date='2008-03-19', end_date='2016-01-01',
ticker_list=None, tech_indicator_list=None, initial_stocks=None, if_eval=False)