I have a tracker mortgage, currently at .7% above ECB rate.
I am very strongly considering moving to a 10 fixed rate at around 4.5%.
The US and Europe are drowning in a sea of debt. This debt will have to be paid off and devaluation and inflation is the time honoured way of managing this. At some point point over the next 10 years I expect inflation and interest rates to rise sharply - rates of 20% are possible given the level of money printing which is now taking place by the Fed.
If you are already on a fixed rate you should consider keeping it. Rates may go down one more time, after that the only way is up.