Always avoid the last 45 minutes of the "Pit Close" in the oil market, unless you have reached the master's skill level as a oil trader, and even then you better be on your A-Game as a trader. Institutional traders often close out or initiate new positions on the last 5-minute bar of the "Pit Trading Session" which often results in large relative volume to overall market liquidity dynamics and leads to explosive spikes in oil at the close (1:30 CST).
Below you find the video