//+------------------------------------------------------------------+
//| GainzAlgo Alpha v2 — Clean-Room Approximation                    |
//| Public baseline: EMA trend + ATR volatility + RSI momentum       |
//| This source does not copy or claim the proprietary calculation.   |
//+------------------------------------------------------------------+
#property copyright "Clean-room approximation"
#property version   "0.1.0"
#property indicator_chart_window
#property indicator_buffers 4
#property indicator_plots   4

#property indicator_label1  "BUY_Buffer"
#property indicator_type1   DRAW_ARROW
#property indicator_color1  clrLimeGreen
#property indicator_label2  "SELL_Buffer"
#property indicator_type2   DRAW_ARROW
#property indicator_color2  clrTomato
#property indicator_label3  "TP_Buffer"
#property indicator_type3   DRAW_LINE
#property indicator_color3  clrDeepSkyBlue
#property indicator_style3  STYLE_DASH
#property indicator_label4  "SL_Buffer"
#property indicator_type4   DRAW_LINE
#property indicator_color4  clrOrange
#property indicator_style4  STYLE_DASH

enum ENUM_DISTANCE_MODEL { DISTANCE_ATR, DISTANCE_SWING };

input int               InpFastEMA=21;
input int               InpSlowEMA=55;
input int               InpATRPeriod=14;
input double            InpATRMultiplier=2.0;
input int               InpRSIPeriod=14;
input double            InpRSIMidline=50.0;
input ENUM_TIMEFRAMES   InpHigherTimeframe=PERIOD_CURRENT;
input bool              InpDisableRepeats=true;
input ENUM_DISTANCE_MODEL InpDistanceModel=DISTANCE_ATR;
input double            InpRiskReward=2.0;
input bool              InpPopupAlert=true;
input bool              InpSoundAlert=false;
input bool              InpPushAlert=false;
input bool              InpEmailAlert=false;
input string            InpObjectPrefix="GAZ_CR_";

double BuyBuffer[];
double SellBuffer[];
double TPBuffer[];
double SLBuffer[];
int atrHandle=INVALID_HANDLE;
int fastHandle=INVALID_HANDLE;
int slowHandle=INVALID_HANDLE;
int rsiHandle=INVALID_HANDLE;
datetime lastAlertBar=0;
int lastDirection=0;

int OnInit()
  {
   SetIndexBuffer(0,BuyBuffer,INDICATOR_DATA);
   SetIndexBuffer(1,SellBuffer,INDICATOR_DATA);
   SetIndexBuffer(2,TPBuffer,INDICATOR_DATA);
   SetIndexBuffer(3,SLBuffer,INDICATOR_DATA);
   PlotIndexSetInteger(0,PLOT_ARROW,233);
   PlotIndexSetInteger(1,PLOT_ARROW,234);
   ArraySetAsSeries(BuyBuffer,true);
   ArraySetAsSeries(SellBuffer,true);
   ArraySetAsSeries(TPBuffer,true);
   ArraySetAsSeries(SLBuffer,true);
   atrHandle=iATR(_Symbol,_Period,InpATRPeriod);
   fastHandle=iMA(_Symbol,_Period,InpFastEMA,0,MODE_EMA,PRICE_CLOSE);
   slowHandle=iMA(_Symbol,_Period,InpSlowEMA,0,MODE_EMA,PRICE_CLOSE);
   rsiHandle=iRSI(_Symbol,_Period,InpRSIPeriod,PRICE_CLOSE);
   if(atrHandle==INVALID_HANDLE || fastHandle==INVALID_HANDLE || slowHandle==INVALID_HANDLE || rsiHandle==INVALID_HANDLE)
      return INIT_FAILED;
   ObjectsDeleteAll(0,InpObjectPrefix);
   IndicatorSetString(INDICATOR_SHORTNAME,"GAZ Alpha v2 Clean Room");
   return INIT_SUCCEEDED;
  }

void OnDeinit(const int reason)
  {
   ObjectsDeleteAll(0,InpObjectPrefix);
   IndicatorRelease(atrHandle);
   IndicatorRelease(fastHandle);
   IndicatorRelease(slowHandle);
   IndicatorRelease(rsiHandle);
  }

void DrawLevel(const string suffix,const datetime barTime,const double price,const color lineColor)
  {
   const string name=InpObjectPrefix+suffix+IntegerToString((long)barTime);
   if(ObjectFind(0,name)<0) ObjectCreate(0,name,OBJ_HLINE,0,0,price);
   ObjectSetInteger(0,name,OBJPROP_COLOR,lineColor);
   ObjectSetInteger(0,name,OBJPROP_STYLE,STYLE_DASH);
   ObjectSetInteger(0,name,OBJPROP_BACK,true);
  }

void FireAlert(const int direction,const datetime barTime,const double entry)
  {
   if(barTime==lastAlertBar) return;
   lastAlertBar=barTime;
   const string side=direction>0 ? "BUY" : "SELL";
   const string message=StringFormat("GAZ Alpha v2 %s | %s | %s | %.5f",side,_Symbol,EnumToString((ENUM_TIMEFRAMES)_Period),entry);
   if(InpPopupAlert) Alert(message);
   if(InpSoundAlert) PlaySound("alert.wav");
   if(InpPushAlert) SendNotification(message);
   if(InpEmailAlert) SendMail("GAZ Alpha v2 signal",message);
  }

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[])
  {
   if(rates_total<InpSlowEMA+InpATRPeriod+5) return 0;
   double atr[],fast[],slow[],rsi[];
   ArraySetAsSeries(atr,true); ArraySetAsSeries(fast,true); ArraySetAsSeries(slow,true); ArraySetAsSeries(rsi,true);
   if(CopyBuffer(atrHandle,0,0,rates_total,atr)<=0 || CopyBuffer(fastHandle,0,0,rates_total,fast)<=0 || CopyBuffer(slowHandle,0,0,rates_total,slow)<=0 || CopyBuffer(rsiHandle,0,0,rates_total,rsi)<=0) return prev_calculated;
   const int start=prev_calculated>0 ? MathMin(rates_total-prev_calculated+2,rates_total-2) : rates_total-2;
   for(int i=start;i>=1;i--)
     {
      BuyBuffer[i]=EMPTY_VALUE; SellBuffer[i]=EMPTY_VALUE; TPBuffer[i]=EMPTY_VALUE; SLBuffer[i]=EMPTY_VALUE;
      const int now=fast[i]>slow[i] && rsi[i]>=InpRSIMidline ? 1 : fast[i]<slow[i] && rsi[i]<InpRSIMidline ? -1 : 0;
      const int prior=fast[i+1]>slow[i+1] && rsi[i+1]>=InpRSIMidline ? 1 : fast[i+1]<slow[i+1] && rsi[i+1]<InpRSIMidline ? -1 : 0;
      if(now==0 || now==prior || (InpDisableRepeats && now==lastDirection)) continue;
      const double risk=atr[i]*InpATRMultiplier;
      const double entry=close[i];
      if(now>0) { BuyBuffer[i]=low[i]-atr[i]*0.25; TPBuffer[i]=entry+risk*InpRiskReward; SLBuffer[i]=entry-risk; DrawLevel("TP_",time[i],TPBuffer[i],clrDeepSkyBlue); DrawLevel("SL_",time[i],SLBuffer[i],clrOrange); }
      else { SellBuffer[i]=high[i]+atr[i]*0.25; TPBuffer[i]=entry-risk*InpRiskReward; SLBuffer[i]=entry+risk; DrawLevel("TP_",time[i],TPBuffer[i],clrDeepSkyBlue); DrawLevel("SL_",time[i],SLBuffer[i],clrOrange); }
      if(i==1) FireAlert(now,time[i],entry);
      lastDirection=now;
     }
   return rates_total;
  }
//+------------------------------------------------------------------+