the support has been tested and went through, but back up now. so spx successfully test the support and prove it is a false break. Will it test again? it is remained to be seen. mean time the chart has became the channel now. so buy at channel low rail and sell at channel up rail. today's channel up rail is arounf 872 by the close. watch out, if we stay below day high till last hour and approach day high in last half hour, then... Are you in the office today to catch the move?