일목균형표 볼린저밴드로 매도 신호 화살표를 만들다./신호 설정 및 조건검색식 https://youtu.be/D2ISoST-u8s aa=(highestsince(1,crossup(trix(20),0),c)+ lowestsince(1,crossdown(trix(20),0),c))/2; A = HighestSince(1, date(1)!=date, V); b=(highest(H,12) - C) / (highest(H, 12) - lowest(L, 12)) * (100); a1= s1=(highest(high,9)+lowest(low,9))/2; s2=(highest(high,20)+lowest(low,20))/2; s3=(highest(high,26)+lowest(low,26))/2; s4=(h..