I believe you are on the right track and on the ES there is significant resistance at 2078.5 which about is about 2085 on the SPX and lines up with my channels. Today's high was 2083 in the cash market and, while there was decent news out of China, most of the buying we are seeing is related to this being OPEX week. Gains made during OPEX are frequently erased in the following week(s).