A jittery natural gas market bracing for a winter of extreme pricing turned in a week of volatile trading for the Sept. 30-Oct. 6 time frame, but forward prices trended lower overall as mild weather and rising stockpiles soothed nerves over the domestic supply situation.

Forward prices at most trading locations took their cues from Henry Hub, where November prices fell 19.2-cents during the period.

However, the week/week change for Henry Hub barely begins to tell the story of a wildly volatile stretch for natural gas prices both at home and — perhaps more significantly when it comes to explaining minute-to-minute swings in the market — abroad.

Over the past week Nymex futures have whipsawed between lows in the $5.50-5.70 neighborhood and highs within arm’s reach of $6.50....