I have changed two parts in all the data2.php pages of the DynamicWebCharts/Data folder, and it finally worked. I can not find $ next to #val# in data1.php pages, so I did not change data1.php.
1. Change <yaxis color="#767a7f" gridcolor="#888d93" format="$#val#"> to format="EUR#val#". (tried with € and &euro but failed)
2. Change <tooltip><![CDATA[#x_label#<br>Revenue: $#val# ]]></tooltip>. to EUR#val# (also tried with € and &euro and failed)
In revenue chart it shows EUR (instead of the Euro symbol).
I would like to suggest that maybe the Flash chart size can be a bit bigger. Sometimes the floating message is longer than the chart. Thank you.