Where to get historical data for Eikon fields not supporting SDate?

Hello.

When using the Eikon Data API get_data(), I am able to set the date for most of the fields that I need using SDate parameter. However, there are a few fields that I cannot set the date, specifically: TR.BetaDaily90D, TR.Volatility90D, TR.NumEstRevisingUp, TR.NumEstRevisingDown, TR.AvgDailyValTraded5D. I understand that I should be able to get the historical data of these fields via DSWS. Would you be able to advise on the equivalent fields in DSWS API get_data() which will give me the same (but historical) data as the EIKON fields?

1) TR.BetaDaily90D: Should I be using Datastream field 897E? If not mistaken this is based on 60-months instead of 90 days? Is there a way to change the period? [ Someone was telling me I could use the expression builder to change the period, but I am not sure how to get the expression and how to put the expression into the get_data() API call. ]

2) TR.Volatility90D: Should I be using Datastream field 550E or 400E?

3) TR.NumEstRevisingUp and TR.NumEstRevisingDown for EPS FY1 and FY2. I saw too many of them at the DSWS online field search. Not sure which is the right one.

4) TR.AvgDailyValTraded5D: I couldn't find any equivalent for DSWS.

Please note that I am a Mac user, so I do not have the Desktop client. Preferably your answer would not require access to the client or excel add-on. Thank you.

Regards,

YC