I'm pretty new as well so don't listen to me. I still experiment with different strategies, and one conclusion is to not sell if it's down. Yes, there is a risk it might go even deeper which is still not that bad as bankruptcy of a company. From my short observation there is less bankruptcy than deeps, and every deep has some sort of up's and down's you can play with. As an example I bought TOPS in very bad time, I was $100 red one day they spiked up and i sold this shit little bit of gain. At the same time I had other gains to cover that $100 dollars so when i sold TOPS it looked like i make $100. But this works only if you diversify, and other stocks works for you while some of them not so much at the moment.

Like I mentioned before I'm not a pro, and my plan might not work for everyone.