VXX Daily Trend Model
I've been having success trading VXX on mush shorter time frames, using 30 and 15 minute models trying to catch intra-day changes in market volatility and direction. Longer-term, the Daily chart might be an effective intermediate directional tool. Note how the Vortex indicator is now neutral as VXX consolidates recent gains.
According to this model, it would take a VXX daily close below 29.43 to suggest the market has reversed to a more bullish bias.