源码
N3:=IF(CLOSE=REF(CLOSE,1),0,VOL);
N:=IF(CLOSE>REF(CLOSE,1),N3,-N3);
N1:=SUM(N,0);
N2:=REF(N1,1);
DRAWKLINE(N1,N2,N2,N1);
MA5:MA(N1,5),COLORWHITE;
MA10:MA(N1,10),COLORYELLOW;
MA20:MA(N1,20),COLORMAGENTA,LINETHICK2;
MA30:MA(N1,30),COLORGREEN,LINETHICK2;
