{圆弧线,只需确定起跌点N,只要后续有更低点,便可划出圆弧}N:=177;H1:=CONst(LLVBARS(L,N));H2:=CONST(REF(L,N-1));H3:=CONST(LLV(L,N));H4:=(N-H1)/(H2-H3);X:=H2-SQRT(POW(N-H1,2)-POW(CURRBARSCOUNT-H1,2))/H4;NOTEXT1:X,COLORGREEN,DOTLINE;NOTEXT2:IF(CURRBARSCOUNT>H1+1,DRAWNULL,X),COLORGREEN,LINETHICK3;