Late July to Early August 2012 a triangle formed. I don't know what degree it represents (wave 4, or B), but it always occurs before the last wave of larger degree.
Relative Strength Indicator has formed a negative divergence with CORN over the last 4 weeks. This is a good indicator a top is forming, in this case at least a short term pullback.
Volume has also been drying up the last 4 weeks.
Stochastics have been overbought for several weeks and look to be heading lower.
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