TC1:=IF(H=HHV(H,48),H,DRAWNULL);
TC2:=CONST(BARSLAST(TC1=H))+1;
UPPER:=CONST(IF(TC2=1,H,REF(H,TC2-1)));
BC1:=IF(L=LLV(L,48),L,DRAWNULL);
BC2:=CONST(BARSLAST(BC1=L))+1;
{}
LOWER:=CONST(IF(BC2=1,L,REF(L,BC2-1)));
LP:=CURRBARSCOUNT<=BC2 AND L=LOWER;{低点定位}
HP:=CURRBARSCOUNT<=TC2 AND H=UPPER;{高点定位}
波段底:IF(LP,10,0),COLORMAGENTA;
波段顶:IF(HP,10,0);
