参数设置：N 1  100  8

源码：
M:=INTPART(3*N/5);
AAA:=REF(H,M)=HHV(H,2*M+1);
QYY:=BACKSET(AAA,M+1);
CCC:=FILTER(QYY,M) AND H=HHV(H,M+1);
DDDD:=BARSLAST(CCC),NODRAW;
GDTSS:=IF(CCC,CURRBARSCOUNT,0);
DINGBUTSS:=IF(DDDD,REF(GDTSS,DDDD),GDTSS);
GDCS11:=CONST(DINGBUTSS);
DINGBUTS11:=REF(DINGBUTSS,DDDD+1);
GDCS22:=CONST(DINGBUTS11);
AA11:=REF(L,M)=LLV(L,2*M+1);
QY11:=BACKSET(AA11,M+1);
CC11:=FILTER(QY11,M) AND L=LLV(L,M+1);
DD11:=BARSLAST(CC11);
DDTSS:=IF(CC11,CURRBARSCOUNT,0);
DDTS11:=IF(DD11,REF(DDTSS,DD11),DDTSS);
DDCS11:=CONST(DDTS11);
DDTS22:=REF(DDTS11,DD11+1);
DDCS22:=CONST(DDTS22);
线1:DRAWLINE(CURRBARSCOUNT=GDCS22,H,CURRBARSCOUNT=GDCS11,H,1),COLORFFAA99,LINETHICK1;
线2:DRAWLINE(CURRBARSCOUNT=DDCS22,L,CURRBARSCOUNT=DDCS11,L,1) COLOR9966FF,LINETHICK1;
预报:H>=线1  AND REF(H<线1,1),NODRAW;    预警:L<=线2 AND  REF(L>线2 ,1),NODRAW;
STICKLINE(预报,O,C,3,0),COLOR00FFFF;    STICKLINE(预警,O,C,3,0),COLORFF0033;