Hello @marta.parvis,
Conveying the response from Datastream experts:
“…Within Datastream we have a few fields that would provide the liquidity ratio of a stock, however it requires an add-on subscription/add-on entitlement to Worldscope Fundamentals which is outside of the normal freely available Datastream content.
Additionally, you may wish to reach out to your Refinitiv account manager, or if you are a student- to your university leader in charge of Datastream enablement, to verify your specific subscription...”