DMI指标中用PDI上穿20线做一个选股指标

N:=14;

MTR:=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);

PDI:=DMP*100/MTR;

XG:CROSS(PDI,20);