DNA polymerase movement

[pegasus10]

Hello, could someone explain me where the energy for the movement of the enzyme DNA polymerase along the DNA comes from? I was thinking about the fact that nucleotides are added as deoxyribonucleosides triphosphates, so this energy could come from the elimination of the pyrophosphate group, but I'm not sure because energy is also required to form the phosphodiester bond, so I don't know if we have enough to power both bond formation and enzyme movement. 

Thanks in advance!