I am looking for some code to activate another macro when the cell changes to "True" (Cell Q1). The cell has a formula behind it: =IF(COUNTIF($T$2:$T$1618,"Implemented-N"),"No","Yes") This formula reads a range of cells, which have a formula behind them (Column T). Column T matches and puts together the data in 2 other cells along the same row: =D2&"-"&N2 When a cell in Column T turns to "Implemented-N" it returns the value of "No" to Cell Q1. When cell Q1 changes to "No" I would like my macro that calls up an email to be activated. I have the code for the email but can't get it to activate when cell Q1 changes to "No". Can anyone please help me?