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The resistance is the 38.2 percent Fibonacci retracement on the fall from the July 24 high of 84.10 to the September low of 78.601.
A high-low bottom formed between Sept. 14 and Oct. 17 points to 81.351, the 50 percent level, indicating a good chance of the index to go above 80.702.
Since the euro is a big component of the index, the double-top pattern on the daily chart of euro/dollar confirms a further gain of the index.