Even though the landscape might have changed, I don't see a reason why trading should change (except maybe for opening up the market to smaller players who are

Even though the landscape might have changed, I don't see a reason why trading should change (except maybe for opening up the market to smaller players who are "energy resellers"...) In the end, trading is betting on arbitrage, and I don't see why an energy producer would stop leveraging this "free money". A simple example: if there was good weather expected in another country, the org would set up a contract to buy the energy surplus in that country at a cheaper price. Whether or not or bio-gas & coal plants were running or not was mostly based on how much energy we needed after taking into account what happened on the trading floor, the price of our fuel and how much the other country would be charging. Of course, the other country could decide we didn't offer a good price and decide to tone down it's amount of energy it produced. I recall a lot of market making on the CO2 emission rights for example, but that's another story. This is a simple scenario, in real life it was way more complex. (Just think about planning something like the delivery of coal at a plant.)