{双降画线主图}

L1:=LLVBARS(L,15);
 L3:=LLVBARS(L,10);
 H1:=FINDHIGHBARS(H,L1+1,10,1);
 L2:=FINDLOWBARS(L,L1+1,20,1);
 H2:=FINDHIGHBARS(H,L3+1,4,1);
 T1:=BARSLAST(CURRBARSCOUNT=CONST(H1)+1);
 T1H:=REF(H,T1);
 T2:=BARSLAST(CURRBARSCOUNT=CONST(L2)+1);
 T2L:=REF(L,T2);
 DRAWLINE(CURRBARSCOUNT=CONST(H1)+1,H,CURRBARSCOUNT=CONST(H2)+1 AND H<T1H,H,1),COLORRED;
 DRAWLINE(CURRBARSCOUNT=CONST(L2)+1,L,CURRBARSCOUNT=CONST(L1)+1 AND L<T2L AND T2>3,L,1),COLORRED;