In any event, and although in the underlying has diminished somewhat since the making of a significant low around 7.00, there remains sufficient in UNG to go covered call here.
100 Shares UNG at 7.69
1 Feb 19 8 Short Call
Entire Package: 6.91 debit (meaning your break even for the setup is $6.91/share, excluding fees commissions)
Max Profit: $109 (if called away at $8)
Tips: Look to take off the entire setup in profit before expiry if profit approaches what you would get if called away. Roll out the short call to a later expiry if it is nearing worthless; look to roll to a strike that at least exceeds your cost basis in the underlying.