Thats why it's so important for DEC to realize winter is delayed huge contango Look at the huge difference in % loss for these two contracts (Dec=/NGZ6) (Nov=/NGX6) expiration Thursday
$natgas is tracking Nov contract which expires this Thurs. DGAZ/UGAZ are tracking Dec contract(roll 5th trading day each month 20% per-day till complete). Nov is selling off as it nears expiration Dec not so much creating huge contango, .451 at time of post.
When the vol of Dec increases above Nov contract stockcharts will change the $natgas chart to Dec and a huge candle will paint showing a massive gain which won't exist. This usually pressures NG to trade lower, but as r59 post show not the case in Nov expiration in 2010
2010 $natgas chart shows that stockcharts let the contract expire then open the next day at new contract price creating huge gaps. Stockchart now rolls to the fwd month at EOD eliminating the gaps but painting big candles depending on contango/backwardization. We may see this today or tomorrow.