Here's a fun fact – the Fibonacci retracement for Alcoa's entire history in our database (spanning over 40 years) – from the low on November 11, 1971 to July 16, 2007 (its lifetime high) provided for a 38.2% retracement at $17.79. Today's high was 17.60, and judging from post-earnings action, it looks like that was probably the high water mark for now. Interesting.
