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.With domestic use volumes that are cloudy at best or delayed until well after the fact, it is not difficult to see why export sales and shipment data receives so much attention from market analysts and traders.Weekly export sales reports from USDA/FAS are always interesting, especially since grain and soy futures markets are so focused on exports. The information is also easily accessed and widely dispersed. Exports are the one demand fact...