The supplied graph illustrates the average change in prices of three metals per months according to 2014.
Looking from an overall perspective, it is readily apparent that whilst the figures for Copper and Nickel exhibited diminishing tendencies, Zinc showed a contrasting pattern.
When it comes to the change of prices for Nickel in January was stood at 6, which ranked first, followed by Copper with the number of 2. Zinc has the figure lower by 1 and increased slightly in February with 3, larger than Copper in 1. Nickel dropped dramatically by 5 with the figure lowest as -3, larger by that was Zinc and Copper with nearly 0.
Looking at the graph for further information, from July to September, all three metals maintain stability, Nickel as -1, Zinc was between 0 and -1, Copper as 1. Then, all three metals were turn upward remarkably in December, the highest was seen in Zinc with 2, next was Copper with between 1 and 2, and then was Nickel with 1.