I know that trading requires knowledge, but any tricks for newbies about when to buy or sell? For example, looking at the volume, looking at the queue for buying and selling and etc.
I am sure that there cannot be any technique to help you to find out the right time for buying and selling altcoins. Probably only a crystal-ball may help because 99.9% of altcoins are driven by devs and NOT by supply-demand based technical things.