Arrow sometimes not appear

and
- Parabolic SAR

My problem is if (in uptrend for exampl) the ac oscillator is already green, there is no arrow when the RSI cross the 50 level, and it wait the ac oscillator to become red and green again, then it draws an arrow.

Can someone kindly fix it very please ?
I really need this to be fixed.

Regards.

//+------------------------------------------------------------------+
//|                                             AcceleratorAlert.mq4 |
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//|                                     Alerts & Arrows added by cja |
//|  Thanks to mladen for the Arrow code & IgorAD for the Alert code |
//|                               Modified and Enhanced by MADAFOREX |
//+------------------------------------------------------------------+
#property  copyright "MADAFOREX"
#property  link      "http://www.madaforex.tk/"
//---- indicator settings
#property indicator_chart_window
//#property  indicator_separate_window
#property  indicator_buffers 3
#property  indicator_color1  Black
#property  indicator_color2  DodgerBlue
#property  indicator_color3  Red
#property  indicator_width2  2
#property  indicator_width3  2


extern bool   PopUP_Alert_ON  = false;
extern bool   SoundAlert_ON   = false;
extern string SoundFile       ="alert.wav";

extern string PSARsetup = "Parabolic SAR";
extern double Step = 0.02;//was .01
extern double Maximum = 0.2;
extern int Precision = 7;

extern bool   Show_Arrows     = true;
extern int    Arrow_Size      = 0;
extern int    ArrowUP         = 233;//241
extern int    ArrowDN         = 234;//242
extern int    Arrow_Shift     = 1;

extern string RSIsetup = "RSI";
extern int RSIPeriod = 14;

//---- indicator buffers
double     ExtBuffer0[];
double     ExtBuffer1[];
double     ExtBuffer2[];
double     ExtBuffer3[];
double     ExtBuffer4[];

bool       UpTrend=false, DownTrend=false;

int      maxArrows;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- 2 additional buffers are used for counting.
   IndicatorBuffers(5);
//---- drawing settings
   SetIndexStyle(0,DRAW_NONE);
   //SetIndexStyle(1,DRAW_HISTOGRAM);
   //SetIndexStyle(2,DRAW_HISTOGRAM);
   IndicatorDigits(Digits+2);
   //SetIndexDrawBegin(0,38);
   //SetIndexDrawBegin(1,38);
   //SetIndexDrawBegin(2,38);
//---- 4 indicator buffers mapping
   SetIndexBuffer(0,ExtBuffer0);
   SetIndexBuffer(1,ExtBuffer1);
   SetIndexBuffer(2,ExtBuffer2);
   SetIndexBuffer(3,ExtBuffer3);
   SetIndexBuffer(4,ExtBuffer4);
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("AC");
   SetIndexLabel(1,NULL);
   SetIndexLabel(2,NULL);
//---- initialization done
   return(0);
  }
  
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
     //ObjectsDeleteAll(0,OBJ_ARROW);
    // ObjectDelete("ACC_BUY");
    // ObjectDelete("ACC-SELL");
       DeleteArrows();
     
//----
   return(0);
  }  
//+------------------------------------------------------------------+
//| Accelerator/Decelerator Oscillator                               |
//+------------------------------------------------------------------+
int start()
  {
   int    limit;
   int    counted_bars=IndicatorCounted();
   
    double prev,current;
   //---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
   limit=Bars-counted_bars;
   //---- macd counted in the 1-st additional buffer
   for(int i=0; i<limit; i++)
      ExtBuffer3[i]=iMA(NULL,0,5,0,MODE_SMA,PRICE_MEDIAN,i)-iMA(NULL,0,34,0,MODE_SMA,PRICE_MEDIAN,i);
   //---- signal line counted in the 2-nd additional buffer
   for(i=0; i<limit; i++)
      ExtBuffer4[i]=iMAOnArray(ExtBuffer3,Bars,5,0,MODE_SMA,i);
  
   //---- dispatch values between 2 buffers
   bool up=true;
   for(i=limit-1; i>=0; i--)
     {
    
      current=ExtBuffer3[i]-ExtBuffer4[i];
      prev=ExtBuffer3[i+1]-ExtBuffer4[i+1];
      if(current>prev) up=true;
      if(current<prev) up=false;
      if(!up)
        {
         ExtBuffer2[i]=current;
         ExtBuffer1[i]=0.0;
        }
      else
        {
         ExtBuffer1[i]=current;
         ExtBuffer2[i]=0.0;
        }
       ExtBuffer0[i]=current;
     }
         
   if (Show_Arrows)
    for (i=0; i<WindowBarsPerChart() ;i++)//Bars for showing total history of signals
         {
          //---- includes rsi & Psar & distance arrow
          double rsi  = iRSI(NULL, 0, RSIPeriod, PRICE_CLOSE, i);
          double sar = NormalizeDouble(iSAR(Symbol(),0,Step,Maximum,i),Precision);
          
         
            if( ExtBuffer3[i]-ExtBuffer4[i]<ExtBuffer3[i+1]-ExtBuffer4[i+1] 
            && ExtBuffer3[i+1]-ExtBuffer4[i+1]>ExtBuffer3[i+2]-ExtBuffer4[i+2] 
            && Volume[0]>1
            && rsi<=50//
            && sar >= iHigh(Symbol(),0,i)
            && !UpTrend) DrawArrow(i,"baisse")
            
            ;
            
            if ( ExtBuffer3[i]-ExtBuffer4[i]>ExtBuffer3[i+1]-ExtBuffer4[i+1] 
            && ExtBuffer3[i+1]-ExtBuffer4[i+1]<ExtBuffer3[i+2]-ExtBuffer4[i+2]
            && Volume[0]>1
            && rsi>=50//
            && sar <= iHigh(Symbol(),0,i)
            && !DownTrend)  DrawArrow(i,"hausse")
            
            ;
         }

    
   if ( current>prev && Volume[0]>1 && !UpTrend)
        {
        if ( PopUP_Alert_ON==true ) Alert(""+Symbol()+" M"+Period()+": ACC Signal for BUY &  "+DoubleToStr(Bid,Digits)+"");
        if(SoundAlert_ON==true)PlaySound(SoundFile); 
        UpTrend=true; DownTrend=false;
        } 
                  
        if ( current<prev && Volume[0]>1 && !DownTrend)
        {
        if ( PopUP_Alert_ON==true ) Alert(""+Symbol()+" M"+Period()+": ACC Signal for SELL &  "+DoubleToStr(Bid,Digits)+""); 
        if(SoundAlert_ON==true)PlaySound(SoundFile);
        DownTrend=true; UpTrend=false;
        } 

   //---- done
   return(0);
  }
  
  
void DrawArrow(int i,string type)//Arrow_Size
{
   double dist = iATR(NULL,0,20,i);
   maxArrows++;
      ObjectCreate("AC_ArrowALERT"+maxArrows,OBJ_ARROW,0,Time[i],0);
      if (type=="baisse")
         {
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_PRICE1,High[i]+((Arrow_Shift)*dist/2));
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_ARROWCODE,ArrowDN);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_WIDTH,Arrow_Size);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_COLOR,Red);
         }
      else
         {
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_PRICE1,Low[i]-((Arrow_Shift)*dist/2));
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_ARROWCODE,ArrowUP);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_WIDTH,Arrow_Size);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_COLOR,GreenYellow);
         }
}
void DeleteArrows()
{
   while(maxArrows>0) { ObjectDelete("AC_ArrowALERT"+maxArrows); maxArrows--; }
}