加了买卖点提示，实用性强，没有未来函数信号不漂移。
指标并不是100%，只作为参考用效果很不错，比系统自带的KDJ好用。
{KDJ买卖点提示副图指标}
N:=9;
M1:=3;
M2:=3;
RSV:=(CLOSE-LLV(LOW,N))/(HHV(HIGH,N)-LLV(LOW,N))*100;
K:SMA(RSV,M1,1);
D:SMA(K,M2,1);
J:3*K-2*D;
超买线:80;
超卖线:20;
中线:50;
DRAWTEXT(CROSS(K,D) AND K<20, K, '买'), COLORRED;
DRAWTEXT(CROSS(D,K) AND K>80, K, '卖'), COLORGREEN;
STICKLINE(J>REF(J,1), J, REF(J,1), 2, 0), COLORRED;
STICKLINE(J<REF(J,1), J, REF(J,1), 2, 0), COLORGREEN;
