Automated Emini Trading Systems - Pro Trader The Micro contracts were introduced in around May 2019 and are 1/10 of the size of the standard E-mini contract. Consequently, they are much more affordable to trade than the E-mini which requires an overnight margin of around $5,000 per contract. So the introduction of micro-mini contracts opens up the world of automated E-mini trading systems to a much wider audience. It now becomes quite realistic to trade with perhaps $2,500 in ones account rather than $25,000. Automated Emini trading systems have become very popular in recent years and need a deep understanding. To get full-fledge knowledge, visit us.