In current scenario it is hard to predict the crypto market, most of altcoins are either dead or have little movement, so I do not recommend to do day trading in crypto. If you are interested in day trading I would recommend you to go to forex market.
Below are few tips to do day trading in forex.
1. Always trade in the direction of bigger TF.
2. Chose an entry point on lower TF.
3. Always trade with SL and TP.
4. Do not risk more than 2.5% amount of total capital in a single trade.
Follow above rules and practice on small account, success will follow you for sure.
Of course, I have no experience trading forex, but my friends tell me that this market provides good income only for selected people. I cannot say how true this is, but I tend to trust my people. It seems to me that in the case of the cryptocurrency, trading on the cryptocurrency market gives you more chances to make a profit thanks to your experience and knowledge, and in this case you really need to choose the right coins for trading. Indeed, a lot of altcoin today do not show any results, but if we talk about day trading, then even a small percentage of price fluctuations over an hour matters.
If you cannot see a good result with the other alt's there just go with the top alt's who got a proper volume and edge to rise up when market becames better, remember there are low odds with low caps alt's so the best thing to do now is to go with safe zones(not actually safe but we can manage) or maybe just stay on bitcoins and wait for the halving is come if your done taking a risk with those alt's.