After a bad performance in FEB, SPX500 continue to rise , attempt to reach a new record high level. I don't know whether it will come ture. But a see a potential bat pattern on it. D shuold be near 88.6% of XA and 1.618-2.618 times of BC, that is the requestment of bat pattern. Now, on this chart, D is 1.618 times of bc as well as 0.886 times of XA. If the price reach there, watch out for the price action, catch a good chance to sell