These stocks have carved new niches in established industries.The Nasdaq may have reached a turning point. In the five trading sessions during the third week in April, the Nasdaq Composite dropped almost 6% and Nvidia fell 14%.The good news is that pullback was more likely a healthy correction than a sign of a permanent decline. That makes more tech stocks a buy. With the lower share prices and many tech stocks showing signs of a resurgence, it may be an excellent time to buy these three stocks.DigitalOcean ...