I consider the Obv moving below the signal line a sell short signal. Sar also on a sell. Mitigating factor Rsi5 on a short term buy. I think we bounce soon but see this as an important reversal. <img src=http://stockcharts.com/def/servlet/SharpChartv05.ServletDriver?chart=$ndx,uu[l,a]daclyiay[db][pd20,2!h.02,.20!f][vc60][ilg20!lb5>