Trading is a long achievement it is not a hastily if your have a more experience about altcion than you can start trading. My strategist is very simple , when a new coin came in market then we buy those coin and some days later we sell it and it make me a best profit.
That is also a strategy in trading. But your strategy isn't the most profitable and effective one. Because like what jisokoo said, most of the time when a new altcoin hits the market, it's price is relatively high compared to what it will become after some days have past. You can take this opportunity to sell the coins that you've bought in its ICO. But take note that this doesn't always happen. Some of the new altcoins can start at a lower price but then pump after some days later.