How can I get the oldest available data for an instrument/timeframe using the maket data snapshot API? Certain instruments are at an all-time high or low and therefore I'm not certain how far back I need to go.
If I choose a wide range I get the most recent data, if If I take a guess e.g. DateTime.UTCNow.AddYears(-23) to DateTime.UTCNow.AddYears(-22) then it silently fails as it can't find any data.
I guess I need the date of the oldest candle then I can request from that date, but not sure how to get it.