Oil is at a steep ascending trend line in a rising wedge. Watch for a breakdown of this level.
Supports below include $45.5 with the .236 fib level, $42.00 at the .382 fib, $40.00 because it is a round number, and the 50% retrace at approximately $39.00. Note this is purely technical and the fundamentals of oil do not suggest oil can or will remain below $40 per barrel.
Please also note the rising RSI support line.