You can watch live rates on many sites. I would suggest
http://www.globaltradestation.com/forex_prices.asp or
http://www.dailyfx.com/fxpowerchart/ChartStation.html
Essentially most markets are in an uptrend and have been for 100 years. If you want to change, look at Oanda above for classic rates. Watch the live rate and buy at an all time high or low. I did this with USD in May at 1.91 GBPUSD and on GBPCAD at 2.52. If you want to get technical, ensure you are young and have lots of hair. Otherwise I would suggest making money in other ways!