Flowfield: Lookup Field A, where Field B (date) is max date

Hello,

I want to lookup the latest price for an item in my table "price history", which contains the fields "item no.", "entering date", "price".

I thought of having a flowfield in the item table which looks up the "price" in this table where "item no."="no." and date=max date

Is there a way to specify the max date?

Workaround:
A different solution could be a normal look up which alway takes the first value in the lookup table. But therefore I'd need to change the sorting to descending. No idea how to do that.

Any suggestions?

Thanks,

geri