Divergences

Hello everyone,

I know divergences between price and oscillators can give forewarning of changes (or continuation) in trends. I’m wondering how reliable divergences are, particularly with respect to warning of a change in trend. Does anyone know if there have been any studies done on this, and would you expect divergences to work better (i.e. give more reliable warning of change in trend) over the longer timescales?

thanks,
Doppy