What is the US dollar index chart?

The U.S. Dollar Index measures the value of the dollar as compared to the value of select foreign currencies that represent major American trading partners. The index began in March 1973 at an arbitrary value of 100.000.

As of January 2015, the mixture of the currencies against which the dollar is measured is 57.6 percent Euro, 13.6 percent Japanese Yen, 9.1 percent Canadian Dollar, 4.2 percent Swedish Krona and 3.6 percent Swiss Franc. In February 1985, the index reached a high of 164.720. In March, the strength of the U.S. Dollar reached its low point, measuring 70.698 on the index. At the end of trading on Sept. 18, 2015, the index was at 95.239.