the most reliable method to trade on the VIX is by trading instruments that track the volatility index. These include Exchange Traded Notes (ETNs), exchange-traded funds (ETFs). CBOE volatility Index (VIX) indicates the measure of uncertainty about the liability of the market to change extreme, rapidly and unpredictably, especially for the worse. Also, online providers enable retail customers to trade CFDs using those instrument as an underlying asset. If you search for an online provider that offers access to the VIX market just with more modest trade sizes you can go with a UK CFD broker