All CME (CME, CBOT, NYMEX, COMEX) Futures assets can be traded. This includes the Micros.
There is no Forex trading on any of the Gauntlet™ products.
UPDATE: As of December 5th, 2019, due to the high margin requirement and the 200% margin required by Helios' FCM for trading BTC (Bitcoin futures), the asset will no longer be allowed to be traded on live accounts and will not count towards your Gauntlet™ or Gauntlet Mini™ completion.
NOTE: Trading low-liquidity contracts on Rithmic carries an inherent risk, as Rithmic bases open equity calculation on Bid/Ask prices, which is what a trader would receive upon closing a trade. This can result in huge swings on a trader's account balance. Please note that it is entirely your responsibility to pay attention to liquidity of assets and if such swings fail your Gauntlet™ attempt, Earn2Trade holds no responsibility.