通达信趋势画线源码

N:=5;
 A1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,1)+1);
 A2:=A1>REF(A1,1);
 B1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,2)+1);
 B2:=B1>REF(B1,1);
 C1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,3)+1);
 C2:=C1>REF(C1,1);

 A11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,1)+1);
 A21:=A11>REF(A11,1);
 B11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,2)+1);
 B21:=B11>REF(B11,1);
 C11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,3)+1);
 C21:=C11>REF(C11,1);
 ①:dRAWLINE(B2,H,A2,H,1),COLORBLUE;
 ②:dRAWLINE(C2,H,B2,H,1),COLORCC6633;
 ③:IF(A1,PEAK(1,N,1),DRAWNULL),COLORFFAA00;
 ④:dRAWLINE(C2,H,A2,H,1),COLORLIBLUE;
 ⑤:dRAWLINE(B21,L,A21,L,1),COLORYELLOW;
 ⑥:dRAWLINE(C21,L,B21,L,1),COLORFF00FF;
 ⑦:dRAWLINE(C21,L,A21,L,1),COLORBROWN;
 ⑧:IF(A11,TROUGH(2,N,1),DRAWNULL),COLORRED;