THE OPEN May beans:  11 lower May meal:  4.00 lower May soyoil:  23 lower  May corn:  12 lower May wheat:  11 lower The markets opened lower as a result of the reversal trade, which set the tone for more profit-taking at the open as sell-stops were triggered.  All eyes were on export sales this morning, though the holidays last week in China and Brazil set the stage for low expectations.  Those expectations were met and exceeded, and the reversal trade was on.  Meal gained on soyoil as oilshare saw profit-taking, which helped beans to come back from fresh lows.   Barges are slowly returning to normal workloads after supplies were halted due to the cold weather extremes.  For...