I thinking, is a problem with DST. Because now is server +3 hour's, but in the 2020/01/01 to change DST only +2hour's. For system used short period ( Timeframe < 240 ) don't depend. But for system working with H4 and D1 must have a different results.

that's all folk...

P.S: if anybody want, I send jupyter script for playing on sand