plz help me fix this indicator

plz help me fix this indicator it not work any more

no code file (mq4) = no fix

//+------------------------------------------------------------------+
//| Supernova.mq4 |
//+------------------------------------------------------------------+

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 DodgerBlue
#property indicator_color2 Magenta


extern int SF = 1;
extern bool Visual_Alert=false;
extern bool Audio_Alert=true;
extern string Audio_Up_File="alert.wav";
extern string Audio_Down_File="alert.wav";
extern bool Email_Alert=false;

extern int Count_Bars=1000;
extern int Arrow_Offset=10;

double ExtMapBuffer1[];
double ExtMapBuffer2[];

bool up=false;
bool dn=false;
datetime last_t=0;
int init()
{
SetIndexStyle(0,DRAW_ARROW);
SetIndexArrow(0,108);
SetIndexBuffer(0,ExtMapBuffer1);
SetIndexEmptyValue(0,0.0);
SetIndexStyle(1,DRAW_ARROW);
SetIndexArrow(1,108);
SetIndexBuffer(1,ExtMapBuffer2);
SetIndexEmptyValue(1,0.0);
return(0);
}
int deinit(){return(0);}
int start()
{
int l=0;
if (Count_Bars>Bars) {l=Bars;}else{l=Count_Bars;}
for (int i=l;i>=0;i--){
ExtMapBuffer1[i]=0;
ExtMapBuffer2[i]=0;
double qqe0_0=iCustom(Symbol(),0,"QQE",SF,0,i);
double qqe0_1=iCustom(Symbol(),0,"QQE",SF,0,i+1);
double qqe1_0=iCustom(Symbol(),0,"QQE",SF,1,i);
double qqe1_1=iCustom(Symbol(),0,"QQE",SF,1,i+1);

if (qqe0_0>qqe1_0 && qqe0_1<=qqe1_1 && !up){
ExtMapBuffer1[i]=Low[i]-Arrow_Offset*Point;
up=true;
dn=false;
}
if (qqe0_0<qqe1_0 && qqe0_1>=qqe1_1 && !dn){
ExtMapBuffer2[i]=High[i]+Arrow_Offset*Point;
dn=true;
up=false;
}
}

if (ExtMapBuffer1[0]>0){
if (Visual_Alert) Alert("Cross up on : "+Symbol()+" at "+TimeToStr(TimeCurrent()));
if (Audio_Alert) PlaySound(Audio_Up_File);
if (Email_Alert) SendMail("QQE_Cross Alert","Cross up on : "+Symbol()+" at "+TimeToStr(TimeCurrent()));
}
if (ExtMapBuffer2[0]>0){
if (Visual_Alert) Alert("Cross down on : "+Symbol()+" at "+TimeToStr(TimeCurrent()));
if (Audio_Alert) PlaySound(Audio_Down_File);
if (Email_Alert) SendMail("QQE_Cross Alert","Cross down on : "+Symbol()+" at "+TimeToStr(TimeCurrent()));
}

return(0);
}

Your indicator depends on the presence of another indicator named "QQE".
You should check first if indeed the other indicator is in your custom indicators folder. That could be the reason it is not working.

thanks alot it work now