I am surprised this topic has not come up more often.
I personally think in this environment, it is vital to use tight stops and high trade frequency.
A small ATR, maybe 3 which will take into account the volatility is one idea.
Though, I prefer a discretionary approach, leaving enough room to move (generally somewhere around a 2 day average), but also tightening dependent on volume, spread, close and patterns, support and resistance.
For example, if I am short and stock falls, then starts to form a flag or an upward wedge, I will give it a bit more room to move, especially if volume is drying up.
This is the most pivitol part of successful and consistent trading IMHO and has to be adapted to suit the environment.
I also like to hedge, shorts and longs and try not to have more than 3x more of one open, than the other. For example, if I have 3 longs, I will try not move above 9 shorts unless I can find another long set-up to add to hedge.
Sure others disagree, but this is just my take on it.
Good topic disarray, I hope it generates some good discussion.