BRB? You mean BRA. Here's a cool article that should answer your questions about ARB and BRA: http://hsxsanity.blogspot.ca/2012/08/what-does-arb-mean.html be sure to thank RogerMore for his article... :)
BW prices: It may be because everyone who plays derivatives has already maxed out on it, so the BW stock doesn't keep going up consistantly. But it shouldn't be a worry, as the BW cashes out and you make the money anyway.