变色的多空源码：
红色表示多，绿色表示空；
a:0,colorwhite; IF(ISNULL(OUTVOL[5])){a=(OUTVOL-INVOL)/(OUTVOL+INVOL);} ELSE a=(OUTVOL-OUTVOL[5]-INVOL+INVOL[5])/(OUTVOL-OUTVOL[5]+INVOL-INVOL[5]); DKX:=a*100; PARTLINE(DKX,DKX>0,RGB(255,0,0),DKX<0,RGB(00,255,0));
