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SCSFExport scsf_ApexVolumeAtPriceStudy(SCStudyInterfaceRef sc)
{
  auto& sg_Green = sc.Subgraph[0];
  auto& sg_Red = sc.Subgraph[1];
  
  if (sc.SetDefaults)
  {
    sc.GraphName = "Apex Volume at Price Study";
    sc.StudyDescription = "Detects conditions for Green and Red Candles based on POC.";
    sc.AutoLoop = 0;
    sc.GraphRegion = 0;

    sc.MaintainVolumeAtPriceData = 1;

    sg_Green.Name = "Green";
    sg_Green.DrawStyle = DRAWSTYLE_SQUARE;
    sg_Green.PrimaryColor = RGB(0, 255, 0);
    sg_Green.LineWidth = 5;

    sg_Red.Name = "Red";
    sg_Red.DrawStyle = DRAWSTYLE_SQUARE;
    sg_Red.PrimaryColor = RGB(255, 0, 0);
    sg_Red.LineWidth = 5;

    return;
  }

  if (sc.VolumeAtPriceForBars->GetNumberOfBars() < sc.ArraySize)
    return;

  for (auto idx = sc.UpdateStartIndex; idx < sc.ArraySize; ++idx)
  {
    if (sc.GetBarHasClosedStatus(idx) != BHCS_BAR_HAS_CLOSED)
      continue;

    const auto numLevels = sc.VolumeAtPriceForBars->GetSizeAtBarIndex(idx);

    if (numLevels == 0)
      continue;

    const s_VolumeAtPriceV2* p_VAP = nullptr;

    auto pocIdx{ 0 };
    auto pocVol{ 0 };

    for (auto lvl = 0; lvl < numLevels; ++lvl)
    {
      if (!sc.VolumeAtPriceForBars->GetVAPElementAtIndex(idx, lvl, &p_VAP, true))
        continue;

      if (!p_VAP)
        continue;

      if (p_VAP->Volume > pocVol)
      {
        pocVol = p_VAP->Volume;
        pocIdx = lvl;
      }
    }

    if (sc.Close[idx] > sc.Open[idx])
    {
      if (pocIdx >= 0 && pocIdx <= 3)
        sg_Green[idx] = sc.Low[idx] - 2 * sc.TickSize;
    }
    else if (sc.Close[idx] < sc.Open[idx])
    {
      if (pocIdx >= 4 && pocIdx <= 7)
        sg_Red[idx] = sc.High[idx] + 2 * sc.TickSize;
    }
  }
}