All the grains (wheat, corn, soybeans) have moved higher during evening trading today. Often, they seem to move in sympathy with one another. Look at these three charts from tonight's trading to see how strikingly similar their charts are. You probably couldn't distinguish between them except by the prices at the right of the screen, since their patterns are so similar tonight.
It is my understanding that price strength in the grains tonight is largely due to a misunderstanding of a dovish speech given by one of the ECB (European Central Bank) officials that caused the US Dollar to rise yesterday, who has now clarified that statement, causing the US Dollar to fall again and commodity prices to respond by rising.