趋势转折－－无未来的转折线

{通达信用的:}
{INPUT: N(3,1,100);}
N:=3;
{转折}
Z_1:=(EMA(C,N)-REF(EMA(C,N),1))/REF(EMA(C,N),1)*100;
Z_2:=IF(Z_1<0,REF(Z_1,BARSLAST(CROSS(0,Z_1))+1),0);
Z_3:=IF(Z_1>0,REF(Z_1,BARSLAST(CROSS(0,Z_1))+1),0);
Z_4:=IF(CROSS(0,Z_1),H,L);

DRAWLINE(CROSS(Z_2,Z_3),H,CROSS(Z_3,Z_2),L,0),LINETHICK2,COLORWHITE;
DRAWLINE(CROSS(Z_3,Z_2),L,CROSS(Z_2,Z_3),H,0),LINETHICK2,COLORMAGENTA;
DRAWLINE(CROSS(0,Z_1)||CROSS(Z_1,0),Z_4,ISLASTBAR,Z_4,0),LINETHICK2,COLORGREEN;

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