We are in a bull market, when I sell individual stocks short and the overall trend of the market is higher, I;

- trade smaller share size
- do not chase weakness lower
- take partial profits quickly
- lower stops above "the most recent lower high"
- honor stops, no justification of holding a loser

These are not recommendations, just chart observations of weak stocks which look ripe for downside.
As always, "make the trade your own."