For market conditions like this, it is difficult to predict coins for the short term, but what we saw for bcd, doge and bch experienced a very high increase yesterday maybe these three coins are worth making in the short term
It honestly is very difficult and huge risks to be trading the market in such situations like this. In an uptrend, it is easier as you see some level of sanity, and for the fact that the market is bound to go up quickly than downward, you really would not want to be shorting too much without some good stop loss as the case may be.
Shorting on the other hand is actually easier in a bear market where everything is simply just going down like lightning and that makes more volatile markets easier to short as long as you can use the market condition itself as an indicator. Normally, no sane trader will want to short the market when it is reaching a potential support in the first place, you only short when there is a break out based on your analysis to the downtrend which is usually always the normal thing to do.
It is trading and it is market, usually nothing is guaranteed and you cannot always be 100% right, but like you said, there is always a need to know when you are making certain decisions in the market which I believe any knowledgeable trader will not make the mistake of buying at resistance or shorting at support.