Please be aware that retail clients cannot trade the following Futures or short Options on Futures (Long options on Futures are allowed):
• CBOE Volatility Index (VIX)
• VSTOXX(R) Mini (VSTOXX)
If you try to place a trade, you will receive the error message Trade would exceed client exposure limitation.
If you wish to trade the above instruments, you must be classified as a Professional client. The reclassification request can be submitted via the trading platform. For example in SaxoTraderGO you navigate to the main menu 
> Your Account > Account status > Request professional status.