## Highlight missing values between to columns

The picture above shows two lists. How do I highlight values in List 1 that are not in List 2? And vice versa? To do this I use conditional formatting.

To extract a list of missing values using excel formula, check this blog post What values are missing in List 1 that exists i List 2?

The conditional formatting formula applied to B3:B7:

The conditional formatting formula applied to D3:D7:

### Explaining CF formula applied to B3:B7

The COUNTIF function counts the number of time the value in cell B3 exists in cell range D3:D7.

Cell |
COUNTIF |
Result |

B3 | COUNTIF($B$3:$B$7, B3) | 0 |

B4 | COUNTIF($B$3:$B$7, B4) | 1 |

B5 | COUNTIF($B$3:$B$7, B5) | 1 |

Now if the COUNTIF function returns 0 (zero) that means that the value is not found in the other cell range and the logical expression returns TRUE.

COUNTIF($D$3:$D$7, B3)=0

becomes

0=0

and returns TRUE.

Cell B3 is highlighted, the value is not found in the other list.

**Get excel example fil****e**

lookup-between-two-lists-of-data-to-highlight-missing-data.xls

(Excel 97-2003 Workbook *.xls)

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