Is NYSE trading overnight?

I'm new to trading. Wikipedia says that NYSE market session is 09:30 - 16:00 but I have noticed using TWS demo account that GOOGL stock for example moves even overnight (00:00 - 6:00 am) is this possible?
 
I'm new to trading. Wikipedia says that NYSE market session is 09:30 - 16:00 but I have noticed using TWS demo account that GOOGL stock for example moves even overnight (00:00 - 6:00 am) is this possible?
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Well irregular trading can be irregular; but not likely
Even if it was ; for practical purposes, unless youre doing REAL ESTATE, where one unit can be a big deal; better figure on reasonable[regular hours/volume]

Related to that like Rich ''turtle ''Dennis told jack schager. ''there is an insurance premium on overnite holds''[meaning swing /position/trend trades.]Wisdom is profitable to direct. Hope this helps
 
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