//+------------------------------------------------------------------+
//|                                   One Candle Theory Signals.mq5 |
//|                                    Copyright 2025, ElOportunista |
//+------------------------------------------------------------------+
#property copyright "Copyright 2025, ElOportunista"
#property link      "https://www.mql5.com"
#property version   "1.00"
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_plots   2

#property indicator_label1  "Buy Signal"
#property indicator_type1   DRAW_ARROW
#property indicator_color1  clrLime
#property indicator_width1  3

#property indicator_label2  "Sell Signal"
#property indicator_type2   DRAW_ARROW
#property indicator_color2  clrRed
#property indicator_width2  3

input int    Maperiod = 20;
input bool   Use_MediaMovil = false;
input int    MinCandleSize = 200;
input double MinPurpleZone = 50;
input double MaxPurpleZonePercent = 80;
input bool   ShowAlerts = true;
input bool   DrawLevels = true;
input bool   See_text = true;
input int    mult = 2;

//--- indicator buffers
double BuySignalBuffer[];
double SellSignalBuffer[];

//--- global variables
datetime lastProcessedH4 = 0;
string symbol;
int digits;
double mypoint;
int emaHandle;

//+------------------------------------------------------------------+
int OnInit()
{
   SetIndexBuffer(0, BuySignalBuffer, INDICATOR_DATA);
   SetIndexBuffer(1, SellSignalBuffer, INDICATOR_DATA);
   
   PlotIndexSetInteger(0, PLOT_ARROW, 233);
   PlotIndexSetInteger(1, PLOT_ARROW, 234);
   
   PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(1, PLOT_EMPTY_VALUE, 0.0);
   
   ArraySetAsSeries(BuySignalBuffer, true);
   ArraySetAsSeries(SellSignalBuffer, true);
   
   symbol = _Symbol;
   digits = (int)SymbolInfoInteger(symbol, SYMBOL_DIGITS);
   mypoint = SymbolInfoDouble(symbol, SYMBOL_POINT);
   
   if(digits % 2 == 1)
      mypoint *= 10;
   
   if(Use_MediaMovil)
   {
      emaHandle = iMA(symbol, PERIOD_H4, Maperiod, 0, MODE_EMA, PRICE_CLOSE);
      if(emaHandle == INVALID_HANDLE)
         return(INIT_FAILED);
   }
   
   Print("Indicador iniciado en ", EnumToString(Period()), " - Analizando H4");
   
   return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
   ObjectsDeleteAll(0, "OCT_", 0, -1);
   
   if(Use_MediaMovil && emaHandle != INVALID_HANDLE)
      IndicatorRelease(emaHandle);
}

//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
{
   ArraySetAsSeries(time, true);
   

   datetime currentH4Time = iTime(symbol, PERIOD_H4, 1);
   
   
   if(currentH4Time != lastProcessedH4)
   {
   
      DrawH4Analysis(currentH4Time);
      lastProcessedH4 = currentH4Time;
   }
   
   return(rates_total);
}

//+------------------------------------------------------------------+
void DrawH4Analysis(datetime h4Time)
{
   datetime temp = iTime(symbol, PERIOD_H4, 1);
   double hi = iHigh(symbol, PERIOD_H4, 1);
   double lo = iLow(symbol, PERIOD_H4, 1);
   double op = iOpen(symbol, PERIOD_H4, 1);
   double cl = iClose(symbol, PERIOD_H4, 1);
   
   datetime temp2 = iTime(symbol, PERIOD_H4, 2);
   double hi2 = iHigh(symbol, PERIOD_H4, 2);
   double lo2 = iLow(symbol, PERIOD_H4, 2);
   
   datetime tempw = iTime(symbol, PERIOD_W1, 1);
   double hiw = iHigh(symbol, PERIOD_W1, 1);
   double lo_w = iLow(symbol, PERIOD_W1, 1);
   
   datetime tempd = iTime(symbol, PERIOD_D1, 1);
   double hid = iHigh(symbol, PERIOD_D1, 1);
   double lod = iLow(symbol, PERIOD_D1, 1);
   
   double candlesize = (hi - lo) / mypoint;
   double purpleZoneUp = (cl - lo) / mypoint;
   double purpleZoneDn = (hi - cl) / mypoint;
   
   if(candlesize < MinCandleSize) return;
   
   if(DrawLevels)
   {
      string suffix = TimeToString(temp, TIME_DATE|TIME_MINUTES);
      
      TrendCreate(0, "OCT_trendwhi_"+suffix, 0, tempw, hiw, tempw + 2*PeriodSeconds(PERIOD_W1), hiw, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trendwlo_"+suffix, 0, tempw, lo_w, tempw + 2*PeriodSeconds(PERIOD_W1), lo_w, clrGray, STYLE_SOLID, 1, false);
      
      TrendCreate(0, "OCT_trenddhi_"+suffix, 0, tempd, hid, tempd + 4*PeriodSeconds(PERIOD_D1), hid, clrDodgerBlue, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trenddlo_"+suffix, 0, tempd, lod, tempd + 4*PeriodSeconds(PERIOD_D1), lod, clrDodgerBlue, STYLE_SOLID, 1, false);
      
      if(See_text)
      {
         TextCreate(0, "OCT_text1_"+suffix, 0, tempw+PeriodSeconds(PERIOD_W1), hiw+10*mypoint, "Weekly High: "+DoubleToString(hiw,digits), "Arial", 8, clrWhite);
         TextCreate(0, "OCT_text2_"+suffix, 0, tempw+PeriodSeconds(PERIOD_W1), lo_w-5*mypoint, "Weekly Low: "+DoubleToString(lo_w,digits), "Arial", 8, clrWhite);
         TextCreate(0, "OCT_text3_"+suffix, 0, tempd+PeriodSeconds(PERIOD_D1), hid+10*mypoint, "Daily High: "+DoubleToString(hid,digits), "Arial", 8, clrWhite);
         TextCreate(0, "OCT_text4_"+suffix, 0, tempd+PeriodSeconds(PERIOD_D1), lod-5*mypoint, "Daily Low: "+DoubleToString(lod,digits), "Arial", 8, clrWhite);
      }
   }
   
   bool isBullish = (cl >= op);
   double purpleZone = isBullish ? purpleZoneUp : purpleZoneDn;
   double purplePercent = (candlesize > 0) ? (purpleZone / candlesize) * 100 : 0;
   
   // Validar purple zone
   if(purpleZone < MinPurpleZone || purplePercent > MaxPurpleZonePercent) return;
   
   // Verificar EMA si está activo
   if(Use_MediaMovil)
   {
      double ema[];
      ArraySetAsSeries(ema, true);
      if(CopyBuffer(emaHandle, 0, 1, 1, ema) > 0)
      {
         if(isBullish && cl < ema[0]) return;
         if(!isBullish && cl > ema[0]) return;
      }
   }
   
   string suffix = TimeToString(temp, TIME_DATE|TIME_MINUTES);
   
   if(isBullish)
   {
      RectangleCreate(0, "OCT_rect_"+suffix, 0, temp, cl, temp+mult*PeriodSeconds(PERIOD_H4), lo, clrPurple);
      
      TrendCreate(0, "OCT_trend1_"+suffix, 0, temp, hi, temp+mult*PeriodSeconds(PERIOD_H4), hi, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trend2_"+suffix, 0, temp, lo, temp+mult*PeriodSeconds(PERIOD_H4), lo, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trend3_"+suffix, 0, temp, hi2, temp+mult*PeriodSeconds(PERIOD_H4), hi2, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trend4_"+suffix, 0, temp, lo2, temp+mult*PeriodSeconds(PERIOD_H4), lo2, clrGray, STYLE_SOLID, 1, false);
      
      if(See_text)
      {
         string rangeText = "Range: " + DoubleToString(candlesize, (digits==2||digits==4)?digits:2) + " pips";
         string zoneText = "Zone: " + DoubleToString(purpleZoneUp, (digits==2||digits==4)?digits:2) + " pips";
         
         TextCreate(0, "OCT_text5_"+suffix, 0, temp+PeriodSeconds(PERIOD_H1), hi+(5*mypoint), rangeText, "Arial", 8, clrWhite);
         TextCreate(0, "OCT_text6_"+suffix, 0, temp+PeriodSeconds(PERIOD_H1), lo-(5*mypoint), zoneText, "Arial", 8, clrWhite);
      }
      
      int barShift = iBarShift(symbol, PERIOD_CURRENT, temp);
      if(barShift >= 0)
      {
         BuySignalBuffer[barShift] = iLow(symbol, PERIOD_CURRENT, barShift) - (10*mypoint);
      }
      
      if(ShowAlerts)
         Alert("ONE CANDLE THEORY BUY - ", symbol, " - Range: ", DoubleToString(candlesize,1), " pips");
   }
   else
   {
      RectangleCreate(0, "OCT_rect_"+suffix, 0, temp, cl, temp+mult*PeriodSeconds(PERIOD_H4), hi, clrPurple);
      
      TrendCreate(0, "OCT_trend1_"+suffix, 0, temp, hi, temp+mult*PeriodSeconds(PERIOD_H4), hi, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trend2_"+suffix, 0, temp, lo, temp+mult*PeriodSeconds(PERIOD_H4), lo, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trend3_"+suffix, 0, temp, hi2, temp+mult*PeriodSeconds(PERIOD_H4), hi2, clrGray, STYLE_SOLID, 1, false);
      TrendCreate(0, "OCT_trend4_"+suffix, 0, temp, lo2, temp+mult*PeriodSeconds(PERIOD_H4), lo2, clrGray, STYLE_SOLID, 1, false);
      
      if(See_text)
      {
         string rangeText = "Range: " + DoubleToString(candlesize, (digits==2||digits==4)?digits:2) + " pips";
         string zoneText = "Zone: " + DoubleToString(purpleZoneDn, (digits==2||digits==4)?digits:2) + " pips";
         
         TextCreate(0, "OCT_text5_"+suffix, 0, temp+PeriodSeconds(PERIOD_H1), hi+(5*mypoint), rangeText, "Arial", 8, clrWhite);
         TextCreate(0, "OCT_text6_"+suffix, 0, temp+PeriodSeconds(PERIOD_H1), lo-(5*mypoint), zoneText, "Arial", 8, clrWhite);
      }
      
      int barShift = iBarShift(symbol, PERIOD_CURRENT, temp);
      if(barShift >= 0)
      {
         SellSignalBuffer[barShift] = iHigh(symbol, PERIOD_CURRENT, barShift) + (10*mypoint);
      }
      
      if(ShowAlerts)
         Alert("ONE CANDLE THEORY SELL - ", symbol, " - Range: ", DoubleToString(candlesize,1), " pips");
   }
   
   ChartRedraw();
}

//+------------------------------------------------------------------+
bool TrendCreate(const long chart_ID, const string name, const int sub_window,
                 datetime time1, double price1, datetime time2, double price2,
                 const color clr, const ENUM_LINE_STYLE style, const int width,
                 const bool ray_right)
{
   ObjectDelete(chart_ID, name);
   
   if(!ObjectCreate(chart_ID, name, OBJ_TREND, sub_window, time1, price1, time2, price2))
      return(false);
   
   ObjectSetInteger(chart_ID, name, OBJPROP_COLOR, clr);
   ObjectSetInteger(chart_ID, name, OBJPROP_STYLE, style);
   ObjectSetInteger(chart_ID, name, OBJPROP_WIDTH, width);
   ObjectSetInteger(chart_ID, name, OBJPROP_RAY_RIGHT, ray_right);
   ObjectSetInteger(chart_ID, name, OBJPROP_BACK, true);
   
   return(true);
}

//+------------------------------------------------------------------+
bool TextCreate(const long chart_ID, const string name, const int sub_window,
                datetime time, double price, const string text, const string font,
                const int font_size, const color clr)
{
   ObjectDelete(chart_ID, name);
   
   if(!ObjectCreate(chart_ID, name, OBJ_TEXT, sub_window, time, price))
      return(false);
   
   ObjectSetString(chart_ID, name, OBJPROP_TEXT, text);
   ObjectSetString(chart_ID, name, OBJPROP_FONT, font);
   ObjectSetInteger(chart_ID, name, OBJPROP_FONTSIZE, font_size);
   ObjectSetInteger(chart_ID, name, OBJPROP_COLOR, clr);
   
   return(true);
}

//+------------------------------------------------------------------+
bool RectangleCreate(const long chart_ID, const string name, const int sub_window,
                     datetime time1, double price1, datetime time2, double price2,
                     const color clr)
{
   ObjectDelete(chart_ID, name);
   
   if(!ObjectCreate(chart_ID, name, OBJ_RECTANGLE, sub_window, time1, price1, time2, price2))
      return(false);
   
   ObjectSetInteger(chart_ID, name, OBJPROP_COLOR, clr);
   ObjectSetInteger(chart_ID, name, OBJPROP_FILL, true);
   ObjectSetInteger(chart_ID, name, OBJPROP_BACK, true);
   
   return(true);
}