Here is an updated 5 minute bar chart of the e-minis. A reaction earlier this morning carried the market down nearly 10 points (first red rectangle). A reaction of similar size from 825 would carry down to 815-16. Note also the purple dotted line. This is roughly the midpoint of the preceding reaction and such levels often provide support in an ongoing trend.
So I think that the reaction that started from the 825 level today will end no lower than the 812-16 zone.