unfortunately I think you have a lot more money to lose to learn, I suggest you study the greeks more and how they change based on what happens...options on the vix are actually the volatility of volatility so it's not that simple...volatility still matters. You didn't really mention what calls you bought or what you bought them on so we can't really tell you why your options dropped in value even though directionally you were correct. Did you buy way out of the money calls? Those would barely change as they have a very low delta...if you bought at the money stuff sure they would have gained value but vol got destroyed today as mentioned previously so yeah they wouldn't be worth as much as they could have had vol remained the same. Remember vol gets firm (goes up) to the downside in the equity market...assuming that is what you are trading. Also don't forget vix options are based on the vix futures...

