Grains rallied across the board overnight and through Wednesday’s day session as a plunging U.S. dollar made U.S. exports more competitive. The move is especially valuable as the Brazilian soybean harvest accelerates and could keep U.S. shipments flowing. The cheaper greenback is also critical for helping U.S. corn exports maintain their pace, which has driven much of the market’s gains this marketing year. Additionally, increasing dry weather concerns in Argentina are supporting the corn market. Grain futures, and wheat in particular, posted some notable technical developments that should help speculative money keep flowing into the complex. The overall fundamental picture remains bearish, but the current upside move seems to b...