Hi, I'm trying to stream prices of different assets using the eikon api, but I can only stream currency prices e.g. GBP=, ETH= etc. When I try to stream equity prices such as AAPL.O or IBM it returns <NA>. Is it possible to stream prices of other instruments? Also, where can I find the full documentation for all methods including streamingprices? Thanks

import eikon as ek
import time

ek.set_app_key('~')

streaming_prices = ek.StreamingPrices(
    instruments = ['AAPL.O],
    fields   = ['TIMACT','CF_BID','CF_ASK']
)

streaming_prices.open()

while True:
    
    time.sleep(1)
    df = streaming_prices.get_snapshot()
    print(df)