SP500 opens on downside Monday morning. The rising 8 day MA is just below the trend and might probably stop any attempts to cross this MA on downside. The 2 hr chart is so far down.

SP500 day 02:34 and 2 hr chart below

SP500 week 02:56 (added now)

SP500 2 hr dot 03:09 (added now) with only 21 MA showing that the 21 MA seems to move down at present and eventually pointing to the possibility of a top