This contract means that your energy rates are linked to energy market activity meaning they may fluctuate throughout the duration of your contract. This means that your energy bill will change month on month.
Why would I want to take this type of contract?
If the energy market is in a great position.
You see yourself as a slight risk taker.
Why would I not want to take this type of contract?
Is the market is increasing and volatile
You have a strict budget to stick too