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);