以下是通达信画线公式
A1:=REF(H,7)=HHV(H,2*7+1);
B1:=FILTER(A1,7);
C1:=BACKSET(B1,7+1);
D1:=FILTER(C1,7),NODRAW;
{高点}
A2:=REF(L,7)=LLV(L,2*7+1);
B2:=FILTER(A2,7);
C2:=BACKSET(B2,7+1);
D2:=FILTER(C2,7),NODRAW;
{低点}
E1:=(REF(LLV(L,2*7),1)+REF(HHV(H,2*7),1))/2;
E2:=(H+L)/2;
H1:=(D1 AND NOT(D2 AND E1>=E2)) OR ISLASTBAR OR BARSCOUNT(C)=1;
L1:=(D2 AND NOT(D1 AND E1<E2));
H2:=D1 AND NOT(D2 AND E1>=E2);
X1:=REF(BARSLAST(H1),1)+1;
F1:=BACKSET(H1 AND COUNT(L1,X1)>0,LLVBARS(IF(L1,L,10000),X1));
G1:=F1>REF(F1,1);
I1:=BACKSET(G1,2);
LD:=I1>REF(I1,1);
{过滤后低点}
L2:=LD OR ISLASTBAR OR BARSCOUNT(C)=1;
X2:=REF(BARSLAST(L2),1)+1;
F2:=BACKSET(L2 AND COUNT(H2,X2)>0,HHVBARS(IF(H2,H,0),X2));
G2:=F2>REF(F2,1);
I2:=BACKSET(G2,2);
HD:=I2>REF(I2,1);
{过滤后高点}
R1:=BACKSET(ISLASTBAR,BARSLAST(HD)+1);
S1:R1>REF(R1,1),NODRAW;
{前一高}
T1:=BACKSET(ISLASTBAR,BARSLAST(LD)+1);
U1:=T1>REF(T1,1);
{前一低}
R2:=BACKSET(S1,REF(BARSLAST(HD),1)+2);
S2:R2>REF(R2,1);
{前二高}
T2:=BACKSET(U1,REF(BARSLAST(LD),1)+2);
U2:=T2>REF(T2,1);
{前二低}
T3:=BACKSET(U2,REF(BARSLAST(LD),1)+2);
U3:=T3>REF(T3,1);
{前三低}
T4:=BACKSET(U3,REF(BARSLAST(LD),1)+2);
U4:=T4>REF(T4,1);
{前四低}
R3:=BACKSET(S2,REF(BARSLAST(HD),1)+2);
S3:R3>REF(R3,1);
{前三高}
R4:=BACKSET(S3,REF(BARSLAST(HD),1)+2);
S4:=R4>REF(R4,1);
{前四高}
R5:=BACKSET(S4,REF(BARSLAST(HD),1)+2);
S5:=R5>REF(R5,1);
R6:=BACKSET(S5,REF(BARSLAST(HD),1)+2);
S6:=R6>REF(R6,1);
DRAWTRENDLINE(S2,H,S1,H,COLORRED);
压力1:=TRENDLINES(S2,H,S1,H);
DRAWTRENDLINE(S3,H,S2,H,COLORLIGHTGREEN);
压力2:=TRENDLINES(S3,H,S2,H);
