#include <Trade/Trade.mqh>
CTrade trade;

// ===== INPUTS =====
input double LotSize = 0.1;

// ===== GLOBALS =====
int macdHandle;
double macdHist[3];

// ===== INIT =====
int OnInit()
{
   macdHandle = iMACD(
      _Symbol,
      _Period,
      12, 26, 9,
      PRICE_CLOSE
   );

   if(macdHandle == INVALID_HANDLE)
   {
      Print("MACD handle failed");
      return INIT_FAILED;
   }

   return INIT_SUCCEEDED;
}

// ===== VOLUME DELTA (GREEN) =====
bool VolumeDeltaGreen()
{
   long volCurrent = Volume[1];
   long volPrevious = Volume[2];

   return (volCurrent > volPrevious);
}

// ===== MACD LIGHT RED =====
bool MACDLightRed()
{
   if(CopyBuffer(macdHandle, 2, 0, 3, macdHist) <= 0)
      return false;

   // Red histogram, but weakening
   return (
      macdHist[1] < 0 &&            // still red
      macdHist[1] > macdHist[2]     // lighter red
   );
}

// ===== MAIN LOOP =====
void OnTick()
{
   // ---- Run once per candle ----
   static datetime lastBarTime = 0;
   datetime currentBarTime = iTime(_Symbol, _Period, 0);

   if(currentBarTime == lastBarTime)
      return;

   lastBarTime = currentBarTime;

   // ---- One trade only ----
   if(PositionSelect(_Symbol))
      return;

   // ---- ENTRY CONDITIONS ----
   if(
      VolumeDeltaGreen() &&
      MACDLightRed()
   )
   {
      trade.Buy(LotSize, _Symbol);
   }
}