Electronic trading, also known as automated trading, algo/algorithmic trading is, quite simply, a process of automatic buying and selling of financial instruments. It can be fully or partially automated. In recent years electronic trading of various flavours became extremely popular. Large banks, hedge funds and other investment institutions are on one end of scale of users, while small day traders and other part time and amateur players can be found on the other. Almost any kind of instrument is available on one electronic platform or another. Traditional shares, options, futures, Forex, bonds, although for the latter the automated markets are not mature enough yet. Lately we also observe the explosive entrance of cryptocurrencies into this field.