m:= 3；

LOWV:=LLV (low, n);

HIGHV:=HHV (high, n);

RSV:= EMA((CLOSE-LOWV)/(HIGHV-LOWV)* 100，M)；

K:=EMA(RSV，M)；

D:=MA(K，M)；

A 1:=BARSLAST(REF(CROSS(K，D)， 1))；

Bottom deviation: REF(CLOSE, A 1+ 1) > close and K & gtREF(K, A 1+ 1) and CROSS(K, d);