I have a little formula problem, I am using and index and match formula to find what date the value is less than zero. However I am not using a continous time series in my figures but a time span for example 2008-01-30 - 2008-02-05. The formula works fine with a continous time series but not for time spans. Does anyone have a clue to get round this. I am enclosing an example where the formula works and also an example where it does not.
Grateful for any help!