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&&HD>LD,HD,0),N);

DMM:=EXPMEMA(IF(LD>0&&LD>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=7  m=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