input: N(5,1,100);
DRAWGBKLAST(CLOSE>0,STRIP(RGB(95,95,95),RGB(0,0,0),0));
A1:=ref(h,N)=hhv(h,2*N+1);
B1:=filter(A1,N);
C1:=backset(B1,N+1);
D1:=filter(C1,n);{高点}
A2:=ref(l,N)=llv(l,2*N+1);
B2:=filter(A2,N);
C2:=backset(B2,N+1);
D2:=filter(C2,N);{低点}
E1:=(ref(llv(l,2*N),1)+ref(hhv(h,2*N),1))/2; E2:=(h+l)/2;{高低点出现在同一K线上时可作取舍}
H1:=(D1 AND not(D2 AND E1>=E2)) OR barstatus=2 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 barstatus=2 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(barstatus=2,barslast(HD)+1); S1:=R1>ref(R1,1); {前一高}
T1:=backset(barstatus=2,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}
短期压力:drawline(S2,h,S1,h,1),Colorred;
短期支撑:drawline(U2,l,U1,l,1),Colorgreen;
中期压力:drawline(S3,h,S2,h,1),Coloryellow;
中期支撑:drawline(U3,l,U2,l,0),Colorgreen;   
长期压力:drawline(S4,h,S3,h,1),COLORwhite;
长期支撑:drawline(U4,l,U3,l,0),Colorgreen;
DRAWICON(S1,H*1.01,10);
DRAWICON(S2,H*1.01,10);
DRAWICON(S3,H*1.01,10);
DRAWICON(S4,H*1.01,10);
DRAWICON(U1,L*0.99,9);
DRAWICON(U2,L*0.99,9);
DRAWICON(U3,L*0.99,9);
DRAWICON(U4,L*0.99,9);