Bollinger Band's five lines still look like all clear upwards. Prices is supported by 25MA in the summer 2017 (June to September), and resisted by +2 sigma in January and February. So, I think Oil is bullish market for long-term because prices fluctuate between monthly 25MA and monthly +2 sigma.
But prices in February stalled and pierced monthly +2 sigma. so I think it decline to 25MA.