George, i agree. they are not good short term investments as their size of moves is not big enough to warrant exposure, also the daily moves in them all tend to be up in the morning down in the afternoon so entry on short term is automatically not profitable.
i keep them, UUP and UDN on my watch list so i can see how Dollar is doing during the day. Note, the US trader are not good at currency trading so they startoff each day very confused. we can see how confused, bu watching them trade these.