1.指标>80 时，回档机率大；指标<20时，反弹机率大；2.K在20左右向上交叉D时，视为买进信号；3.K在80左右向下交叉D时，视为卖出信号；4.J>100 时，股价易反转下跌；J<0 时，股价易反转上涨；5.KDJ 波动于50左右的任何信号，其作用不大。
N:=5;M1:=3;M2:=3;
RSV:=(CLOSE-LLV(LOW,N))/(HHV(HIGH,N)-LLV(LOW,N))*100,LINETHICK2;
K:SMA(RSV,M1,1),COLORWHITE;
D:SMA(K,M2,1),COLORYELLOW;
J:3*K-2*D,COLORMAGENTA;
IF(J<0,J,DRAWNULL),COLORMAGENTA;
IF(K>90,K,DRAWNULL),COLORWHITE;
IF(D>85,D,DRAWNULL),COLORYELLOW;
0,COLORRED,LINETHICK2;20,COLORLIMAGENTA;{50,COLORWHITE;}
80,COLORBLUE;100,COLORGREEN,LINETHICK2;
DRAWTEXT(ISLASTBAR,0,'高安全区'),COLORRED;
DRAWTEXT(ISLASTBAR,20,'安 全 区'),COLORLIMAGENTA;
DRAWTEXT(ISLASTBAR,80,'风 险 区'),COLORBLUE;
DRAWTEXT(ISLASTBAR,100,'高风险区'),COLORGREEN;
DRAWICON(CROSS(J,0)AND K>=REF(K,1),J,1);
DRAWICON(CROSS(J,20)AND K>=REF(K,1),J,1);
DRAWICON(CROSS(100,J)AND K<=REF(K,1),J,2);
DRAWICON(CROSS(80,J)AND K<=REF(K,1)<100,J,2);
DRAWICON(CROSS(K,D),K,25);
DRAWICON(CROSS(D,K),D,27);
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