/HG Copper gap up between 2PM and 3PM PST

Does anyone know why Copper Futures /HG gap up today after 3PM PST when market re-open? It was a big gap, if there was no trading during the previous hour reset, why it gap up? Please help me understand this.

 

The contract rolled from Dec to Mar.

 

Which month? I looked at Dec and March, see no "gaps".

 

It's today for Dec I think

 

Yeah, no gaps here that I can see on Dec HG in your timeframe area. (The right side of the chart.)

 

Here is what I see at 15:00 PST today 11/27/2017, right when the market re-open

 

Dude, the contract ROLLED.

 

Hi Maverick74, I am still new to Future market. So what happened when someone still hold a Short right before that? Can you explain and why the price different? Thank you.

 

Your broker will not let you hold a physically settled future beyond last notice. You will get an e-mail usually a few days ahead warning you and then a final e-mail the day before warning you that the contract will be liquidated on last notice day.

 

Thank you for that Maverick74