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You are correct. Currently, it doesn't support realtime feed.
Please refer to this question.
I think the get_data fonction only authorize snapshots. Is it possible to have realtime feed?
@guillaume.lefur there is Elektron Websocket API which provides realtime streaming market data, and can be used with any programming language - including python. Currently it requires additional infrastructure components.
Don't getting Realtime Feed using ThomsonReuters.Desktop.SDK.DataAccess.Signed v1.8.4
API EIKON is not updating trace viewer last prices
Any way to be connected real time (PYTHON)
Streaming real-time sample
Time delay for CF_LAST