They can be used for anything. The theory is something along the lines of yesterday's price action provides a probable range for prices today. Problem with forex markets is that they are 24hrs, so you don't really get a true reflection of where the previous day's trading range was - but then again, I don't trade forex, so speak to the experts. Maybe Ninja can advise?
If you go to ...futurespros.com webside, you shall find the current pivots for 5min, 10min, hourly and daily time frames. Both for forex and indexes. Select forex or indices at the top tab and look for pivots on the left edge menu. Just do not base your trades on it, these are just supporting indicators. Also they are not set for whole period, they change during the day (in order to confuse beginners....)