The point I was trying to make was you can't follow the market or predict the market. Unless you are an insider with the whales then you can't win. The dumps happen too quickly. All you can do is buy and hope or sell and hope. I would be impressed if someone showed me a winning formula for day trading bitcoin when you can't control the pump and dumps.
If myself has my own way to notice dumping movement, it usually happens when upcoming weekends or there is bad news about crypto currencies. While the beginning of the week such as Sunday/Monday usually has a good trend to do market recovery, so you can see the volume will be a lot of active buying during the working day.
Know what? I have noticed it, too. Either coincidence or not, technically the trend is good at that day sunday/Monday.
OP shall gather more strategies and tactics. Day trading is not profitable for those who are not yet veterans in this field. Whenever you see the continuosly dumping value of your coins, you can sell them immediately. With of course, when you think your profits are just enough.