Altcoins have markets with low market capacities, so it is price that they rise with any news.
Listing news and advice that tell you that the time to buy is all fake and you will end up losing your money.
The effect is when a whale or some players place orders to buy in bulk, you can take advantage of the high price trading volumes, buy and sell during the next hour.
That should be scalping right, but scalping is not the only type of trading. I love position trading since it give me more time for my job. Also I buy and hold for sometime. That has been my secrete. I don't have all the time to be looking at chart every second or hour.