Normally ( but i am not a specialist ) the OPEN sessions are Japan/ China / Australia /HK / SG singapor ---------> Europa ( Frankfurt / London / Paris ) --------------> USA.......
Since some weeks, London has lost its 1st place on the Financial Markets, being replaced by NY
https://www.investopedia.com/articles/investing/030116/top-three-financial-centres-world.asp
Quote :
New York ranked first for the competitive areas of financial sector development and reputation. The city ranked second for business environment and infrastructure and third for human capital.
[h=2]The Bottom Line[/h] New York overtook London and assumed first place in the index. Because of the ongoing uncertainties caused by Brexit, New York is likely to retain its number one spot for the next few years.