Several factors have helped support this week’s higher grain and soy prices, but it will be whatever tone is set by this Friday’s WASDE that will determine whether the rally is sustainable. General Comments Following Monday’s pattern, grain and soy futures prices continued the pre-report rally. Wheat was the leader, scoring the highest prices in at least two months. KC HRW futures closed up 13 cents or more, Chicago SRW contracts were up better than 11 cents in most cases and MGE HRS futures finished up about a dime. The overnight session price action was mixed, although prices mostly traded lower. The rally did not get started until after the day session opened.It is hard to point at specific reasons behind this week’s rally as it seems...