OTC (Over The Counter)
Also referred to as the futures market
The Endex represents a publication of various energy prices. These are not trading prices; the trading prices are published on the OTC market. The OTC is a market for the purchase and sale of electricity for future delivery at prices agreed upon today. The delivery can be within a month, three months, a year, or several years. The OTC does not use standardized prices, rather prices based on bilateral agreements. You may trade up till several work days ahead.
Notice the relevant products:
Flex electricity
Relax electricity