M:=30;
山腰:IF(CURRBARSCOUNT =M,CONST((HHV(H,30)+LLV(L,30))/2),DRAWNULL),COLORYELLOW,DOTLINE;
DRAWNUMBER(CURRBARSCOUNT=N,山腰,山腰),COLORYELLOW;

{
选股公式:

TJ1:=IF(CURRBARSCOUNT =30,CONST((HHV(H,30)+LLV(L,30))/2),DRAWNULL);
XG:BETWEEN(C,TJ1*0.95,TJ1*1.05);
}