It's only one-fifth the size of the big DAX contract. Looks like a good fit for smaller retail traders who hold overnight. Trades in Euros.
Eurex. Here's an update on activity: http://www.eurexchange.com/exchange-en/about-us/news/update-on-mini-dax--futures-18-days/2265680
I trade via spot can go down to 10cents or something per point, 1pt spread no comms via FXCM works nicely for me, if you want smaller!! * had no idea how big a normal contract is!
Liquidity is most commonly associated with volume, but a more appropriate definition is the tightness of the bid-ask spread and depth of the market. On both of these counts, this young contract is looking good.
I agree that volume is not necessarily the best indicator for liquidity and bid-ask spread may be a better source but it goes further than that when you consider quality of the bid-ask and quantity. Liquidity to a one lot trader is very different from liquidity for a 1,000 lot trader. FDXM does look decent again today and I imagine volume will pick up when the U.S. cash market opens as ES:FDXM spreaders will come into play.