Bear markets often have explosive rallies. A big bullish candle finishes off the short positions and then continues to fall. If you keep holding short positions without selling, when that kind of surge happens, your position is already gone, and you can't wait for the subsequent decline. In the short term, just completely clear all positions, wait for the next rally, and then look for a place to short again. It's the idea of rolling over short positions, but I’m not rolling over positions; I’m rolling over profits. I keep the profits from each high short, so the market can't take them back.