Hey Roman!
Merry Christmas to you too, mate!
Yes, the end of December is not really the best time to trade. There are huge transactions happening. Huge corporations are taking their profits at the end of the year, into their own country in their own currency.
For example, lets say you have business in UK, and you are digging oil. At the end of the year you have 5 billions of profit in Pounds. What you would do is to transfer them in US and exchange in USD. This huge transaction will actually cause a move in GBPUSD pair. And this is something that no one will know about(except you and the bank that makes the transaction).
So normally I pause the live accounts between Christmas and New Year.
Let me know if you have any questions!
Kind regards,