Dislikedhow is this possible with the market closed??
you know of an online website that will show these prices.
keep in mind the market will tend to close that gap sometime within the first few hours after the open.
so the first sign of a reverse after the open i would close it or take a hedge and look to reenter if the downtrend continues once the gap is closed.Ignored
The fact that most brokers are closed because of lack of liquidity does not mean that the market is closed and that is the reason for the gaps which often appear at Sunday opening. The current quote on GJ is 225.97, but with an hour before most brokers go live, that could change significantly.