This graph illustrates the average monthly change in price during 2014, comparing data from three different metals: copper, nickel and zinc. While the number bad been fluctuating, eventually these three metals were quite similar by the end of the survey.
At the beginning of the data, copper is the highest number of price change in the total, at a 6% rapidly climb, compared with previous month. But such fortune was short-live. In next five months, things went bleak, at 9% sharply drop in total, from 6% to -3%. After several months of struggles, copper welcome the prosperous in last half year, slightly increased to 1%.
Similarly, the proportion of change in price of metal who is nickel, as well as this who is zinc remained relatively stable, ranging between 3% and -1% in a year. It is noticeable the three metals in last month of percentage is almost not different.