买卖总量的差值

{分时副图}
总卖量:ALLASKVOL,colorgreen,LINETHICK0;
总买量:ALLBIDVOL,colorred,LINETHICK0;
DT:ALLBIDVOL-ALLASKVOL;
STICKLINE(DT>0,DT,0,10,0),COLOR000033;
STICKLINE(DT>0,DT,0,7,0),COLOR000066;
STICKLINE(DT>0,DT,0,3,0),COLOR0000AA;
STICKLINE(DT>0,DT,0,1,0),COLORRED;
STICKLINE(DT<0,DT,0,10,0),COLOR003300;
STICKLINE(DT<0,DT,0,7,0),COLOR006600;
STICKLINE(DT<0,DT,0,3,0),COLOR00AA00;
STICKLINE(DT<0,DT,0,1,0),COLOR00FF00;