with a helper column you could add formula then do conditional formats for the color
Sheet1
<TABLE style="BACKGROUND-COLOR: #ffffff; PADDING-LEFT: 2pt; PADDING-RIGHT: 2pt; FONT-FAMILY: Tahoma,Arial; FONT-SIZE: 10pt" border=1 cellSpacing=0 cellPadding=0><COLGROUP><COL style="WIDTH: 30px; FONT-WEIGHT: bold"><COL style="WIDTH: 31px"><COL style="WIDTH: 33px"><COL style="WIDTH: 33px"><COL style="WIDTH: 14px"><COL style="WIDTH: 29px"><COL style="WIDTH: 14px"></COLGROUP><TBODY><TR style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt; FONT-WEIGHT: bold"><TD> </TD><TD>A</TD><TD>B</TD><TD>C</TD><TD>D</TD><TD>E</TD><TD>F</TD></TR><TR style="HEIGHT: 17px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">1</TD><TD style="FONT-FAMILY: Verdana"> </TD><TD style="FONT-FAMILY: Verdana">Jan</TD><TD>Feb</TD><TD> </TD><TD>Mar</TD><TD> </TD></TR><TR style="HEIGHT: 17px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">2</TD><TD>USA</TD><TD style="TEXT-ALIGN: right">5%</TD><TD style="TEXT-ALIGN: right">10%</TD><TD style="BACKGROUND-COLOR: #339966; COLOR: #ffffff">↑</TD><TD style="TEXT-ALIGN: right">2%</TD><TD style="BACKGROUND-COLOR: #ff0000; COLOR: #ffffff">↓</TD></TR><TR style="HEIGHT: 17px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">3</TD><TD>UK</TD><TD style="TEXT-ALIGN: right">15%</TD><TD style="TEXT-ALIGN: right">25%</TD><TD style="BACKGROUND-COLOR: #339966; COLOR: #ffffff">↑</TD><TD style="TEXT-ALIGN: right">1%</TD><TD style="BACKGROUND-COLOR: #ff0000; COLOR: #ffffff">↓</TD></TR></TBODY></TABLE>
<TABLE style="BORDER-BOTTOM-STYLE: groove; BORDER-BOTTOM-COLOR: #00ff00; BORDER-RIGHT-STYLE: groove; BACKGROUND-COLOR: #fffcf9; BORDER-TOP-COLOR: #00ff00; FONT-FAMILY: Arial; BORDER-TOP-STYLE: groove; COLOR: #000000; BORDER-RIGHT-COLOR: #00ff00; FONT-SIZE: 10pt; BORDER-LEFT-STYLE: groove; BORDER-LEFT-COLOR: #00ff00"><TBODY><TR><TD>
Spreadsheet Formulas</TD></TR><TR><TD><TABLE style="FONT-FAMILY: Arial; FONT-SIZE: 9pt" border=1 cellSpacing=0 cellPadding=2><TBODY><TR style="BACKGROUND-COLOR: #cacaca; FONT-SIZE: 10pt"><TD>Cell</TD><TD>Formula</TD></TR><TR><TD>C2</TD><TD>=10%</TD></TR><TR><TD>D2</TD><TD>=IF(C2>B2,"↑","↓")</TD></TR><TR><TD>F2</TD><TD>=IF(E2>C2,"↑","↓")</TD></TR><TR><TD>D3</TD><TD>=IF(C3>B3,"↑","↓")</TD></TR><TR><TD>F3</TD><TD>=IF(E3>C3,"↑","↓")</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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