fixed error with changing "or" to "|"

[mablue]

when I run this qtpylib.crossed(DFIND, DFCRS)

i get this error:
2021-05-09 13:03:54,424 - freqtrade - ERROR - Fatal exception!
joblib.externals.loky.process_executor._RemoteTraceback:
"""
Traceback (most recent call last):
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/externals/loky/process_executor.py", line 431, in _process_worker
r = call_item()
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/externals/loky/process_executor.py", line 285, in call
return self.fn(*self.args, **self.kwargs)
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/_parallel_backends.py", line 595, in call
return self.func(*args, **kwargs)
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/parallel.py", line 262, in call
return [func(*args, **kwargs)
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/parallel.py", line 262, in
return [func(*args, **kwargs)
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/externals/loky/cloudpickle_wrapper.py", line 38, in call
return self._obj(*args, **kwargs)
File "/home/mab/freqtrade/freqtrade/optimize/hyperopt.py", line 274, in generate_optimizer
bt_results = self.backtesting.backtest(
File "/home/mab/freqtrade/freqtrade/optimize/backtesting.py", line 354, in backtest
data: Dict = self._get_ohlcv_as_lists(processed)
File "/home/mab/freqtrade/freqtrade/optimize/backtesting.py", line 196, in _get_ohlcv_as_lists
self.strategy.advise_buy(pair_data, {'pair': pair}), {'pair': pair})[headers].copy()
File "/home/mab/freqtrade/user_data/hyperopts/GodStraHo.py", line 122, in populate_buy_trend
File "/home/mab/freqtrade/freqtrade/vendor/qtpylib/indicators.py", line 238, in crossed
return above or below
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/pandas/core/generic.py", line 1442, in nonzero
raise ValueError(
ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/mab/freqtrade/freqtrade/main.py", line 37, in main
return_code = args'func'
File "/home/mab/freqtrade/freqtrade/commands/optimize_commands.py", line 86, in start_hyperopt
hyperopt.start()
File "/home/mab/freqtrade/freqtrade/optimize/hyperopt.py", line 426, in start
f_val = self.run_optimizer_parallel(parallel, asked, i)
File "/home/mab/freqtrade/freqtrade/optimize/hyperopt.py", line 341, in run_optimizer_parallel
return parallel(delayed(
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/parallel.py", line 1054, in call
self.retrieve()
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/parallel.py", line 933, in retrieve
self._output.extend(job.get(timeout=self.timeout))
File "/home/mab/freqtrade/.env/lib/python3.8/site-packages/joblib/_parallel_backends.py", line 542, in wrap_future_result
return future.result(timeout=timeout)
File "/usr/lib/python3.8/concurrent/futures/_base.py", line 439, in result
return self.__get_result()
File "/usr/lib/python3.8/concurrent/futures/_base.py", line 388, in __get_result
raise self._exception
ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().