A few articles about Collectiv'Traders 

https://medium.com/@marcraffard/collectivtraders-presentation-155638805d23
https://medium.com/@marcraffard/why-refer-is-the-cornerstone-of-collectivtraders-2acf326cf47c
https://medium.com/@marcraffard/collectivtraders-a-disruptive-player-in-the-trading-industry-edae03454a52