I presume that is a one minute chart, so i ttook three minutes to get to the new trading range. Who got some?
Keep in mind that RIM trades on the Toronto Exchange (TSX) too. And there is no afterhours trading on the TSX like there is in the USA. So all the shorts on the TSX will have to starting covering at Monday's open! I imagine the arbs will keep the TSX and USA prices in line. So, it could rise further in the USA. As of Feb 28th there were 3,730,823 RIM shares short on the TSX Avg daily volume is 513,157... http://www.canada.com/nationalpost/financialpost/fpmarketdata/short_positions.html
If they really wanted to hedge the position going into Monday they'd just buy the US, which I suspect they are doing... Then they can spend the next couple weeks unwinding...