from ib_async import IB, Stock

ib = IB()
ib.connect('127.0.0.1', port=4002, clientId=1)

aapl = Stock('AAPL', 'SMART', 'USD')
ib.qualifyContracts(aapl)

bars = ib.reqHistoricalData(
    aapl,
    endDateTime='',
    durationStr='1 D',
    barSizeSetting='1 day',
    whatToShow='TRADES',
    useRTH=True,
)
print(f'AAPL close: {bars[-1].close}')

ib.disconnect()