This week's Export Sales report from USDA offers insight into the grain market's likely price pattern going forward. Based on historic export patterns, U.S. exporters are facing a situation different from last year. Similarly, soybean sales point to changing opportunities for those in the oilseed industry.The weekly and daily export sales reports have long been an accepted common thread  for markets, traders, end users and anyone interested in agricultural commodities. These are poured over by those seeking to discover trends and/or surprises that might affect markets and prices.The USDA FAS Export Sales Reporting Program reports the total volume of export sales and shipments of roughly 40 different agricultural commodities on a weekly...