I've previously been using Dex2 to request a timeseries of TR.TradePriceClose, and employed the currency conversion functionality provided (eg add Currency=USD to the request).
For various reasons I'm looking at moving to the .NET API instead, and was wondering if there is any straightforward way to specify a desired target currency when requesting a historic timeseries?
I'm afraid the answer is no. Since Eikon .NET SDK does not provide currency conversion capability, you'd have to program currency conversion yourself, which is not a trivial task. Perhaps it's better to stay with Dex2 at least for this part of the project?