Crude Oil Volatility Index (OVX) chart showing oil trade volatility spiking from the 20s to 330s during black swan event. Published on April 19, 2020 in EPIC V3.1 Crude Oil Machine Trade Software Update Details | White Paper #OOTT $CL_F $USO $USOILFull resolution (1487 × 900) Crude Oil Volatility Index (OVX) chart showing oil trade volatility spiking from the 20s to 330s during black swan event. Crude Oil Volatility Index (OVX) chart showing oil trade volatility spiking from the 20s to 330s during black swan event.