指标通过计算价格波动来识别市场买卖时机。它主要分析三条曲线的关系：当快线从下向上穿过慢线时产生买入信号，反之是卖出信号；同时关注另一条辅助线的拐点变化来确认趋势强度。
操作策略很简单：当快线上穿慢线时考虑买入，下穿时考虑卖出，同时参考辅助线的转向来增加判断准确性。指标还特别关注较长时间周期的走势来过滤短期噪音。
A1:="KD.K"(9,3,3);
A2:="KD.D"(9,3,3);
RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
K:=SMA(RSV,3,1);
D:=SMA(K,3,1);
J:=3*K-2*D;
周K:=MA("KDJ.K#WEEK"(9,3,3) ,5);
周D:=MA("KDJ.D#WEEK"(9,3,3) ,5);
周J:MA("KDJ.J#WEEK"(9,3,3) ,5),COLOR00FF00,LINETHICK2;
IF(C>0,50,DRAWNULL),COLOR00FF00,LINETHICK6;
IF(周K>=周D,50,DRAWNULL),COLORFF00FF,LINETHICK6;
DRAWTEXT(CURRBARSCOUNT=4,50,'KD金叉'),COLORFFFFFF;
STICKLINE(周K>=周D,周K,周D,1,1),COLORFF00FF;
STICKLINE(周K< 周D,周K,周D,1,1),COLOR00FFFF;
IF(周J>=REF(周J,1),周J,DRAWNULL),COLORRED,LINETHICK2;
STICKLINE(C>0,105,110,2,1),COLOR00FF00;
STICKLINE(周J>=REF(周J,1),100,110,2,0),COLORFF00FF;
DRAWTEXT(CURRBARSCOUNT=4,110,'J拐点'),COLORFFFFFF;
STICKLINE(C>0,-5,-10,2,1),COLOR00FFFF;
STICKLINE(周K>=REF(周K,1),-10,0,2,0),COLOR0000FF;
DRAWTEXT(CURRBARSCOUNT=4,-5,'K拐点'),COLORFFFFFF;
