N:=10;M:=30;
VA:=IF(CLOSE>REF(CLOSE,1),vol,-VOL);
obv:SUM(IF(CLOSE=REF(CLOSE,1),0,VA),0);
OBV1:MA(OBV,N);
OBV2:MA(OBV,M);
{ _通达信股票指标公式}
买点1:crOSS(OBV,OBV2) AND SUM(OBV,20)<SUM(OBV2,20),COLORGREEN,NODRAW;
DRAWICON(买点1,OBV2,27);
买点2:CROSS(OBV1,OBV2),COLORMAGENTA,NODRAW;
DRAWICON(买点2,OBV2,25);