Look at the strength of the dollar to see where oil will go. If the dollar continues to rise oil will get cheaper.
Oil will not go down to $20. It costs far more than $20 to extract a barrel of oil from the ground, especially in America with all the frackers.
Essentially only a few cheap and easy play remain viable long term at $20 a barrel, it would be below the historical low prices and cannot be maintained.
The price of gasoline has been steadily rising recently in America, figure that one out, so that won't be helping the economy. Demand will also rise if gas prices fall, so expect a sharp rise when production falls and demand rises.
There will always be counter pressures on price movement regardless of direction. I would love to see it drop to $20 but I don't expect it. The dollar would have to rise dramatically for that to happen. A stronger dollar and lower energy costs are a great thing for any economy so while I don't expect it I would love to see it.