MTR:=Sum(Greater(Greater(最高价-最低价,ABS(最高价-前日收盘价)),ABS(前日收盘价-最低价),14);

HD :=最高价-ref(最高价,1);)

LD :=ref(最低价,1)-最低价;

DMP:=Sum(if(HD>0 and HD>LD,HD,0),14);

DMM:=Sum(if(LD>0 and  LD>HD,LD,0),14);

PDI:= DMP*100/MTR;

MDI:=DMM*100/MTR;

PDI上穿MDI:crossover(PDI,MDI);