I've just bought and read Yu's "Underground Trader.com Guide to Electronic Trading" and Wolff's "Trading on Momentum." As both are a couple of years old I was wondering if others had read them and if they feel the authors' strategies are outdated, i.e. Yu's reliance on stochastics. I have checked other threads but they're old. Would also be interested in hearing from current or former Yu and Wolff chat-room customers. Thanks in advance.