Thanks for the reply,
but I´m looking for a custom field due to a specific reason, I will put on the field a graphical indicator, for management reports, and honestly with a lot of task and dependencies a baseline against progress is quite a pain for evaluation, anyway I look for a forecast, that means on tasks that may not have started, therefore are aligned with the baseline.

Im qute sure there will be a formula in the custom fields that can work deliver such function but, I´m not very strong will all thouse "If´,s;and´s;or´s...ect
(I have so far a graphical indicator showing delayed tasks, on time and without baseline,...)
I just need the formula that looks for predecessor and in case they are delayed put a flag "at risk" on the depending task

Im sure Im not the only one looking for such function...