Hi,
You need 2 dummy series with data based on Col1 and Col2 data. This will
have their data labels linked to 2 more columns of cells with text based on
column 3
Assume this is the data
A1: =<empty>    B1: =Col1    C1: =Col2    D1: =Col3    E1: =DumCol1    F1:
=DumCol2    G1: =DumCol1Lab    H1: =DumCol2Lab
A2: =a    B2: =1    C2: =2    D2: =10    E2: =IF(B2>C2,B2,NA())    F2:
=IF(B2<=C2,C2,NA())    G2: =IF(ISNA(E2),"",$D2)
A3: = b   B3: =2    C3: =3    D3: =20
A4: = c   B4: =3    C4: =2    D4: =30
A5: =d    B5: =4    C5: =3    D5:= 40
Cells E2:G5 can be filled by dragging formula down.
Cells H2:H5 can be filled by dragging G2:G5 right.
Now create a cluster column chart on A1:F5 plotting data in columns.
Delete Data3 series
Move DummyCol1 and DummyCol2 to secondary axis
Delete secondary axis
Link DummyCol1 data labels to the range G2:G5 position outside end
Link DummyCol2 data labels to the range H2:H5 position outside end
You may need to adjust the formula in the event of ties. Currently the
information is displayed on the right side is a draw.
This addin will allow you to easily link data labels to cells.
Cheers
Andy
http://www.appspro.com/Utilities/ChartLabeler.htm