Natural gas traded in New York swung between gains and drops on Friday traded near the strongest figures in more than a two-year period after heading demand declined amid milder weather forecast in the U.S. Natural gas for delivery in January decreased 0.2% to $4.45 a million British thermal units as of 12:02 p.m. on the NYMEX following an advance to $4.492, the most since July 2011.