Both files contain the exact same set of Open High Low Close data. The formula based version is easier to understand and serves as a way to verify that the VBA code that I wrote is correct. Both methods give the same result.  The major benefit of using VBA is that the parameters for MACD can be easy changed from the input boxes. In addition the VBA method shows only the final result rather than take up five columns.

The VBA based version can be downloaded here.

The formula version can be downloaded here. Below is the code from the VBA based version.

Sub ETmacd() 'written by Exceltrader www.exceltrader.net
Dim EMAslow As Double, EMAfAst As Double, ws As Worksheet, LR As Integer
Dim eMaF() As Double, eMaS() As Double, EMAdif(), emaPer() As Double, MacDper As Double, coUnt As Integer
Dim DataRange As Range
Dim ExPSlowWeight As Double
Dim ExPFastWeight As Double
Dim PerWeight As Double
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
''  The below three lines are the MACD settings.                                         ''
''  The Values can either be changed here or uncomment the inputbox lines to be prompted.''
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
EMAslow = 13 'InputBox(Prompt:="Enter Macd Slow settings.", Title:="MACD SLOW", Default:="13")
EMAfAst = 5 'InputBox(Prompt:="Enter Macd Fast settings.", Title:="MACD Fast", Default:="5")
MacDper = 6 'InputBox(Prompt:="Enter Macd Period settings.", Title:="MACD Period", Default:="6")
ExPSlowWeight = 2 / (EMAslow + 1)
PerWeight = 2 / (MacDper + 1)
ExPFastWeight = 2 / (EMAfAst + 1)
Set ws = ThisWorkbook.Worksheets("VBA") 'or use exact sheet name for example ThisWorkbook.worksheet("Sheet1")
'slow
    With ws
    LR = .Cells(Rows.coUnt, "A").End(xlUp).Row
        For Each DataRange In ws.Range(.Cells(2, "A"), .Cells(LR, "A"))
        coUnt = DataRange.Row + 1
        'fill the eMA slow Array
        ReDim Preserve eMaS(1 To coUnt)
                If coUnt = EMAslow + 1 Then
                    'get the first value which is the Simple Moving average
                     eMaS(coUnt) = Application.Average(ws.Range(.Cells(2, "E"), .Cells(coUnt, "E")))
                ElseIf coUnt > EMAslow Then
                    eMaS(coUnt) = (.Cells(coUnt, "E") * ExPSlowWeight) + (eMaS(coUnt - 1) * (1 - ExPSlowWeight))
                End If
        Next DataRange
'fast
        For Each DataRange In ws.Range(.Cells(2, "A"), .Cells(LR, "A"))
        coUnt = DataRange.Row + 1
        'fill the eMA slow Array
        ReDim Preserve eMaF(1 To coUnt)
                If coUnt = EMAfAst + 1 Then
                    'get the first value which is the Simple Moving average
                     eMaF(coUnt) = Application.Average(ws.Range(.Cells(2, "E"), .Cells(coUnt, "E")))
                ElseIf coUnt > EMAfAst Then
                    eMaF(coUnt) = (.Cells(coUnt, "E") * ExPFastWeight) + (eMaF(coUnt - 1) * (1 - ExPFastWeight))
                End If
        Next DataRange
        ReDim Preserve EMAdif(EMAslow To UBound(eMaF))
            For coUnt = EMAslow + 1 To UBound(eMaF)
                EMAdif(coUnt) = eMaF(coUnt) - eMaS(coUnt)
            Next coUnt
'MacD Period
        Dim x As Integer, y As Integer, z As Integer, Avee As Double
        y = EMAslow + MacDper - 1
            For x = y To UBound(EMAdif) - 2
                'get the SMA for first value
                If x = y Then
                        For z = EMAslow + 1 To EMAslow + MacDper  '(EMAslow + MacDper - 1)
                        Ave = Ave + EMAdif(z)
                        Next z
                        ReDim emaPer(x To LR)
                        emaPer(x) = Ave / MacDper
                ElseIf x > y Then
                emaPer(x) = (EMAdif(x + 1) * PerWeight) + (emaPer(x - 1) * (1 - PerWeight))
                End If
            Next x
  x = Empty: y = Empty: z = Empty
  x = LBound(emaPer)
  y = UBound(emaPer)
  For z = x To y - 1
  .Cells(z + 1, "J") = EMAdif(z + 1) - emaPer(z)
  Next z
End With
End Sub 'written by Exceltrader www.exceltrader.net

DataConverter.xls allows you to configure the Number of OHLC bars that should be condensed down into a single bar. You also can list the file name, sheet, and columns where your data is located.  The data will almost instantly be transformed into the higher time frame you have requested.

Instructions:

1. Download DataConverter.xls (*last updated 1/1/2011)
2. Open DataConverter.xls. (Quickstart!: Skip the directions below. Just Open file and press “Convert” to see how it works with default settings.
3. If you have OHLC Data in a workbook, open that file (you can also just use the default sample data that is contained on the sample data sheet in DataConverter.xls)
4. Enter the Column letter for each type of data (Time/date, Open, High, Low, Close, Volume)
5. Enter the Name of the WorkBook and worksheet that contain the data. For example, to convert 1 Minute bars to 4 minute bars, simply enter 4. To convert 3 minute bars to 15 minute bars enter 5 (5*3=15) etc etc.
6. Finally press the “Convert” Button.  The converted data will appear in a new workbook. Save as desired.

The constant volume bar option, updates a new bar after a certain amount of volume has completed. This amount should be entered into D3 of the “Live” sheet. Checks are in place to prompt if the values are not entered and the constant volume is set to override the default time based bars.

Below is an example of Constant volume bar charting. You will notice that each bar contains roughly the same amount of volume.