Create an EA that will open 4 empty subwindows with its appropriate height

#define SUBWINDOW4 "Trade Window"

use SubwindowTemplate to open the 4 windows above, height = 60 pixel/pane, show subwindow shortname on the top left corner of the subwindows

Obtain the full height without subwindow of the Main Chart in pixels.  80% of total Chart height dedicated to 4 panes.  each pane will have 20% max chart pixel and divide that by 12 maximum rows and 30 maximum column
save these pixel heights in int    m_YDistance[Y_DISTANCE_BUFFER];

example, total height of chart = 1000 pixels.  800 pixel dedicated to the subwindows.  each subwindows have a maximum of 12 rows. so 800 pixels/4 panes = 200 pixel/12 rows = ......

instead of using iCustoms to open the subwindows use hash to open the windows instead

like the following:-
CGraphics::Graphics()
[
     m_WindowsHash=new Hash(); // create new hash to manage the window handlers
}

CGraphics::InitTechnicalAnalysisWindow0(string WindowName)

{

if(!InitSubwindow(WindowName))

    {

      printf("Fail to Init Sub-Window Name = "+WindowName);

      return false;

    }

    int windowID = ChartWindowFind(m_WindowID[1], WindowName);   

   if(windowID<0)

      return false;

ResizeSubWindow(WindowName,m_ChartHeightPixel[1]);

}

//+------------------------------------------------------------------+

//|                                                                  |

//+------------------------------------------------------------------+

bool Graphics::StartCustomIndicator(int hWnd,string ChartName,bool AutomaticallyAcceptDefaults=false)

  {

   ResetLastError();

   printf("Start Custom Indicator");

   uchar charArrayIndicatorName[];

   StringToCharArray(ChartName,charArrayIndicatorName,0);

   // printf("charArrayIndicatorName = "+charArrayIndicatorName);

   int MessageNumber=RegisterWindowMessageW("MetaTrader4_Internal_Message");

   int res=SendMessageW(hWnd,MessageNumber,15,charArrayIndicatorName);

   if(res)

     {

      LogError(__FUNCTION__,"Failed to post a msg winAPI",GetLastError());

      return false;

     }

   return true;

  }

//+------------------------------------------------------------------+

//|                                                                  |

//+------------------------------------------------------------------+  

bool Graphics::InitSubwindow(string ChartName)

  {

   ResetLastError();

   if(WindowFind(ChartName)>0)

     {

      if(m_WindowsHash.hGetInt(ChartName) < 0)

         m_WindowsHash.hPutInt(ChartName,WindowFind(ChartName));

      return true;

     }

   int hWnd=WindowHandle(Symbol(),0);

   if(!hWnd)

     {

      LogError(__FUNCTION__,"Window not found",GetLastError());

      return false;

     }

   bool res=StartCustomIndicator(hWnd,ChartName);

   if(WindowFind(ChartName)<0)

     {

      MessageBox(ChartName+" Indicator window not found.","ERROR",MB_ICONERROR);

      LogError(__FUNCTION__,ChartName+" Indicator window not found",GetLastError());

      return false;

     }

   if(res)

      m_WindowsHash.hPutInt(ChartName,WindowFind(ChartName));

   return res;

  }