The Forex broker OctaFX (an ECN FX broker) offers a weekly trading competition for demo accounts using cTrader trading platform. It is a contest offering cash prizes to the top 5 places, ie the 5 traders that have the best performance for the duration of the competition. Because it is a competition for demo accounts, participants do not risk their money at any time and have the chance to practice their trading strategies and make money in the process.
-Duration of the competition: At the moment, competition takes place during every week and is valid for 2015 and 2016 or until OctaFX says otherwise.