DIFF : =EMA(CLOSE,12) - EMA(CLOSE,26);
DEA := EMA(DIFF,9);
RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
K:=SMA(RSV,3,1);
D:=SMA(K,3,1);
A:=CROSS(K,D)&&CROSS(DIFF,DEA);
B:=CROSSDOWN(K,D)&&CROSSDOWN(DIFF,DEA);
DRAWCOLORKLINE(B,COLORGREEN,0);
DRAWCOLORKLINE(A,COLORRED,0);
A||B,SPARK;