RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100; K:=SMA(RSV,3,1); D:=Sma(K,3,1); A2:=BArslAst(REF(crOSS(K,D),1)); B2:=REF(C,A2+1)>C AND REF(K,A2+1)<K AND CROSS(K,D); kdj底背:B2>0;