We present an interactive demo that illustrates the performance of our multi-agent-based system for trading ’green’ energy. The system implements the NRG-X-Change concept and uses real-life data for energy consumption. NRGX-Change encourages prosumers to locally trade their excess of energy while payments are carried out using NRGcoins, which is a novel decentralized digital currency. We illustrate the performance of a real and typical neighbourhood in Belgium with 62 residential houses, 56 of them are consumers while the remaining 6 are prosumers. Participants can interact with the demo by playing with energy consumption and production, and analyzing in real-time the behaviour of the energy market and in turn the price for NRGcoins. Categories and Subject Descriptors I.2.11 [Computing Methodologies]: Multi-Agent Systems Keywords multi-agent system; smart grid; renewable energy; energy trading; energy markets