(base) Roberts-MBP:alpaca-bots robertgrzesik$ python main.py screener -l
2021-01-05 14:15:19,727: INFO: Strategy Screener: Executing the initialize lifecycle method
2021-01-05 14:15:20,045: INFO: Strategy Screener: Executing the before_starting_trading lifecycle method
2021-01-05 14:15:20,046: WARNING: Strategy Screener: sell all
2021-01-05 14:15:20,083: INFO: Strategy Screener: Executing the on_trading_iteration lifecycle method
2021-01-05 14:15:20,084: INFO: Strategy Screener: Porfolio value of 40000
2021-01-05 14:15:20,084: INFO: Requesting asset bars from alpaca API
2021-01-05 14:15:24,496: INFO: Note: NumExpr detected 12 cores but "NUMEXPR_MAX_THREADS" not set, so enforcing safe limit of 8.
2021-01-05 14:15:24,497: INFO: NumExpr defaulting to 8 threads.
2021-01-05 14:16:17,100: INFO: Selecting best positions
2021-01-05 14:16:17,105: ERROR: index -1 is out of bounds for axis 0 with size 0
2021-01-05 14:16:17,110: ERROR: Traceback (most recent call last):
File "/Users/robertgrzesik/Development/alpaca-bots/strategies/strategy.py", line 523, in run
self._run_trading_session()
File "/Users/robertgrzesik/Development/alpaca-bots/strategies/strategy.py", line 482, in _run_trading_session
self.on_trading_iteration()
File "/Users/robertgrzesik/Development/alpaca-bots/tools/decorators.py", line 64, in func_output
frame, result = call_function_get_frame(func_input, *args, **kwargs)
File "/Users/robertgrzesik/Development/alpaca-bots/tools/decorators.py", line 24, in call_function_get_frame
result = func(*args, **kwargs)
File "/Users/robertgrzesik/Development/alpaca-bots/strategies/screener.py", line 36, in on_trading_iteration
self.buy_winning_stocks(
File "/Users/robertgrzesik/Development/alpaca-bots/strategies/screener.py", line 60, in buy_winning_stocks
new_positions = self.select_assets(data, min_increase_target)
File "/Users/robertgrzesik/Development/alpaca-bots/strategies/screener.py", line 82, in select_assets
momentum = bars.get_momentum()
File "/Users/robertgrzesik/Development/alpaca-bots/entities/bars.py", line 25, in get_momentum
momentum = self.df["close"].pct_change(n_rows - 1)[-1]
File "/Users/robertgrzesik/opt/anaconda3/lib/python3.8/site-packages/pandas/core/series.py", line 879, in __getitem__
return self._values[key]
IndexError: index -1 is out of bounds for axis 0 with size 0
2021-01-05 14:16:17,110: WARNING: Strategy Screener: sell all
The end
Here is the result of running the strategy: