this doesn't mean anything we were stuck back on 350 and now we are on 400$ almost
so this doesn't mean anything we can make tomorrow 500 or for 10 days
We have about 24 days to the end of 2015. If it reaches $500 by then, it will have to rise $4.2 on average per day. It is quite difficult.
Or, instead of linear increases, it could rise slightly less that 0.95% every day for 24 days. That seems less difficult (and is "easier" than what we saw in October: if you look at price increases for the 24 days up to and including 29 October - when price reached $300 - then the average price increase is over 1%).
Not saying that we will see an increase (personally I think we'll see a fairly flat trend until the New Year), just that it's not as unlikely as it might appear at first glance.