Anyone using Darvas' method would have made a fortune in the tech bubble, when the market retreated, the stop losses would have moved one safely to the sidelines.
The ideal candidate would be a company with a promising product or technology, that has been outperforming the market. Fix the boxes, buy on a breakout (should be at an all time high price), set a stop loss. If the stock continues to climb, consider adding more, keep the stop losses trailing the price. Let the market tell you when to get out.