ROC变动率指标周期通常设为（12,6），实际上观察的是市场动量的变化。由于市场存在短、中、长博弈，KST完定指标对不同周期的动量变化进行综合研判，较好地剔除市场杂波，提高了可靠性。将KST指标思想进而推广到成交量，综合研判更加可靠。两者源码如下：
{------KST 价咯------}
A:=CLOSE;
{A:=VOL;}
ROC1:=100*(A-REF(A,N1))/REF(A,N1);
ROC2:=100*(A-REF(A,N2))/REF(A,N2);
ROC3:=100*(A-REF(A,N3))/REF(A,N3);
ROC4:=100*(A-REF(A,N4))/REF(A,N4);
KST:(MA(ROC1,N1)+2*MA(ROC2,N2)+3*MA(ROC3,N3)+4*MA(ROC4,N4))/10,COLORYELLOW,DOTLINE;
KSTMA4:MA(KST,4),COLORCYAN,DOTLINE;
KSTMA10:MA(KST,10),COLORRED,DOTLINE;
A1:0,DOTLINE,COLORRED;
IF(KST>REF(KST,1),KST,DRAWNULL),COLORYELLOW;
IF(KSTMA4>REF(KSTMA4,1),KSTMA4,DRAWNULL),COLORCYAN;
IF(KSTMA10>REF(KSTMA10,1),KSTMA10,DRAWNULL),COLORRED;


{------KST 成交量------}
A:=VOL;
ROC1:=100*(A-REF(A,N1))/REF(A,N1);
ROC2:=100*(A-REF(A,N2))/REF(A,N2);
ROC3:=100*(A-REF(A,N3))/REF(A,N3);
ROC4:=100*(A-REF(A,N4))/REF(A,N4);
KST:(MA(ROC1,N1)+2*MA(ROC2,N2)+3*MA(ROC3,N3)+4*MA(ROC4,N4))/10,COLORYELLOW,DOTLINE;
KSTMA4:MA(KST,4),COLORCYAN,DOTLINE;
KSTMA10:MA(KST,10),COLORRED,DOTLINE;
A1:0,DOTLINE,COLORRED;

IF(KST>REF(KST,1),KST,DRAWNULL),COLORYELLOW;
IF(KSTMA4>REF(KSTMA4,1),KSTMA4,DRAWNULL),COLORCYAN;
IF(KSTMA10>REF(KSTMA10,1),KSTMA10,DRAWNULL),COLORRED;

n1=9;n2=13;n3=18;n4=24.