fair_value_gap_scanner_mt5.mq5

#property version   "1.00"
#property description "Closed candle fair value gap scanner with mitigation tracking."
#property indicator_chart_window
#property indicator_plots 0
#property indicator_buffers 0

input group "Gap Detection"
input int              InpMaximumBars        = 400;       // Bars to scan
input double           InpMinimumGapPoints   = 20.0;      // Minimum gap in points
input bool             InpShowBullishGaps    = true;
input bool             InpShowBearishGaps    = true;
input bool             InpHideMitigated      = false;
input bool             InpUseFullFill        = true;      // Full fill or first touch

input group "Display"
input int              InpExtensionBars      = 80;
input color            InpBullishGapColor    = clrPaleGreen;
input color            InpBearishGapColor    = clrMistyRose;
input color            InpMitigatedColor     = clrGainsboro;
input uchar            InpTransparency       = 55;
input bool             InpShowLabels         = true;

input group "Alerts"
input bool             InpEnableAlerts       = false;

string   g_prefix="FVGSCAN_";
datetime g_last_bar=0;
datetime g_last_alert_bar=0;

int OnInit()
  {
      // код доступен только после оплаты
   }

void OnDeinit(const int reason)
  {
   ObjectsDeleteAll(0,g_prefix);
   ChartRedraw(0);
  }

bool IsBullishMitigated(const int formation_index,const double gap_bottom,
                       const double gap_top,const double &low[])
  {
   const double threshold=(InpUseFullFill ? gap_bottom : gap_top);
   for(int index=formation_index-1; index>=0; index--)
      if(low[index]<=threshold)
         return(true);
   return(false);
  }

bool IsBearishMitigated(const int formation_index,const double gap_bottom,
                       const double gap_top,const double &high[])
  {
   const double threshold=(InpUseFullFill ? gap_top : gap_bottom);
   for(int index=formation_index-1; index>=0; index--)
      if(high[index]>=threshold)
         return(true);
   return(false);
  }

void DrawGap(const string id,const datetime start_time,const datetime end_time,
             const double top,const double bottom,const bool bullish,
             const bool mitigated)
  {
   const string rectangle_name=g_prefix+"BOX_"+id;
   color base_color=(mitigated ? InpMitigatedColor :
                     (bullish ? InpBullishGapColor : InpBearishGapColor));

   if(!ObjectCreate(0,rectangle_name,OBJ_RECTANGLE,0,start_time,top,end_time,bottom))
      return;

   ObjectSetInteger(0,rectangle_name,OBJPROP_COLOR,ColorToARGB(base_color,InpTransparency));
   ObjectSetInteger(0,rectangle_name,OBJPROP_FILL,true);
   ObjectSetInteger(0,rectangle_name,OBJPROP_BACK,true);
   ObjectSetInteger(0,rectangle_name,OBJPROP_SELECTABLE,false);
   ObjectSetInteger(0,rectangle_name,OBJPROP_HIDDEN,true);

   if(!InpShowLabels)
      return;

   const string label_name=g_prefix+"TEXT_"+id;
   const double label_price

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