ek.get_timeseries( ['AAPL.O','AA'], interval='tick', start_date='2017-10-27T14:10:00', end_date='2017-10-27T16:10:00' ) has error message:
ValueError: Shape of passed values is (4, 177595), indices imply (4, 33723)
it seems that the tick time series for different rics have different length so they can not be concatenated together. But pulling 1 ric at a time is too time-consuming. Anyone knows how to do bulk request for tick?