“…Monitoring of the electricity market plays the key role under the conditions of free markets (Balitskiy et al, 2014;Dzikevičius, Šaranda, 2016;Ignotas, Stasytytė, 2016;CrisanMitra et al, 2016;Anic et al, 2016;Limba et al, 2016;Lisin et al, 2016;Kasperowicz, Štreimikienė, 2016;Brożyna et al, 2016;Strielkowski et al, 2017). Supervisory actions are important for the system operator as well as regulatory commissions in their ensuring efficient market performance.…”