通达信:即直观又准公式（绝无未来!）

RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;

K:SMA(RSV,3,1),COLORWHITE;

D:SMA(K,3,1),COLORYELLOW;

J:3*K-2*D,COLORYELLOW;

IF(K<REF(K,1),K,DRAWNULL),COLORGREEN,LINETHICK1;

IF(D<REF(D,1),D,DRAWNULL),COLORGREEN,LINETHICK1;

IF(J<REF(J,1),J,DRAWNULL),COLORFFFF00,LINETHICK1;

IF(K>REF(K,1),K,DRAWNULL),COLORRED,LINETHICK1;

IF(D>REF(D,1),D,DRAWNULL),COLORRED,LINETHICK1;

IF(J>REF(J,1),J,DRAWNULL),COLORFF00FF,LINETHICK1;