Thanks for the offer of support!!!! Im using a stand alone MS project 2010. Ive lots of projects listed, each with numerous tasks underneath and Im using this to monitor all the interdependencies etc and the overall portfolio timeline. This is working well. There are many tasks though that have high numbers of predecessors or successors and I want to be able to use a graphical indicator in a custom field to pick out those activities with more than, say 8 predecessors as red or more than 5 as amber. Same for successors. Im new to project though and this formula defeats me.