TR:=EXPMEMA(MAX(MAX(HIGH-LOW,ABS(HIGH-REF(CLOSE,1))),ABS(REF(CLOSE,1)-LOW)),N);
HD :=HIGH-REF(HIGH,1);
LD :=REF(LOW,1)-LOW;
DMP:=EXPMEMA(IF(HD 0 LD,HD,0),N);
DMM:=EXPMEMA(IF(LD 0 HD,LD,0),N);
PDI: DMP*100/TR;
MDI: DMM*100/TR;
A7:=C-REF(C,1);
A8:=100*EMA(EMA(A7,6),6)/EMA(EMA(ABS(A7),6),6);
SHORT:=7;
LONG:=19;
RMA:=EMA(CLOSE,SHORT);
NMA:=EMA(CLOSE,LONG);
UP:=DRAWLINE(L=LLV(L,BARSLAST(CROSS(NMA,RMA))+1),LLV(L,BARSLAST(CROSS(NMA,RMA))+1),H=HHV(H,BARSLAST(CROSS(RMA,NMA))+1),HHV(H,BARSLAST(CROSS(RMA,NMA))+1),0);
DOWN:=DRAWLINE(H=HHV(H,BARSLAST(CROSS(RMA,NMA))+1),HHV(H,BARSLAST(CROSS(RMA,NMA))+1),L=LLV(L,BARSLAST(CROSS(NMA,RMA))+1),LLV(L,BARSLAST(CROSS(NMA,RMA))+1),0);
买进:(LLV(A8,2)=LLV(A8,7) AND COUNT(A8 0,2) AND CROSS(A8,MA(A8,2))) AND REF(DOWN,1) REF(DOWN,2) AND UP REF(DOWN,1),STICK,COLORBLUE,LINETHICK3;
DRAWTEXT(买进,0.5,'买进'),COLORRED;
;参数n=7m=6 用到画线函数，配合其他指标使用。不可把买卖点作为买卖依据
