I personally don't trade this asset but it has devoloped a setup for my strategy.
An ABC correction/ Flat has run it's course and we currently have an impulse and a flag to the upside.
Byuing the break of the flag looks like a good idea.
Oil is possibly ending a B wave inside a higher degree C wave and the gartley allows me to get short inside the blue area. Wait for a bearish trigger/pattern before entry. A break above the last swing high (51.80) will invalidate the trade.