LC:=REF(CLOSE,1); RSI1:=SMA(MAX(CLOSE-LC,0),13,1)/SMA(ABS(CLOSE-LC),13,1)*100; AH:=HHV(RSI1,8); AL:=LLV(RSI1,8); STO1:=IF(AL=AH,0,100*(RSI1-AL)/(AH-AL)); SK:EMA(STO1,5); SD:EMA(SK,3); A:80; B:20;