The prognosis over weekend changed, weather in next days should be colder then expected before weekend, this means we expect bigger consumption, larger draw and more bullish conditions for price change. This of course does not guarantee price to go up, but fundamentals for Henry Hub Natural Gas Futures are now more bullish if compared to Friday.
I expect price to go up on 1st second and even if you invest there is nothing you can do here, if there is change it will happen at once on opening. And it all depend how you left your positions on Friday. In my case move ups would be good. But if we go down and we float for 1-2 days between 2.5 and 2.6 I will open new small long positions.