LC:=REF(CLOSE,1); S_RSI:MA(MAX(CLOSE-LC,0),17)/MA(ABS(CLOSE-LC),17)*100; AH:=HHV(S_RSI,3); AL:=LLV(S_RSI,2); STO1:=IF(AL=AH,0,100*(S_RSI-AL)/(AH-AL)); SK:MA(STO1,3); SD:MA(SK,1); A:80; B:20; 30,DOTLINE; 70,DOTLINE;