UNG is the worst way to play Natural Gas for the long term
Because of the price structure of Natural Gas futures it continually loses value. For a couple of days it is OK, but you can't ride it very long. I prefer Royalty Trusts or MLPs with distributions tied to the commodity price. Right now, you can buy a Royalty Trusts paying well over 8 percent and with the outlook that they will increase their distribution as Gas prices go up. If the distributions increase, the stock price will go up. The best ones right now, are MTR, CRT for high current payout. HGT and SJT distributions will eventually be good too.