P1:=5;P2:=4;VAR1:=LLV(LOW,P1);VAR2:=HHV(HIGH,P1);K:=EMA((CLOSE-VAR1)/(VAR2-VAR1)*100,P2);D:=EMA(0.667*REF(K,1)+0.333*K,2);XG:K<=25 AND CROSS(K,D);