Am I wasting my time with this thing, or what? I've been implementating a trading system based on statistical arbitrage, and I've been porting elements from books with EL code. I look on their online help to see if, for example, they've already coded a basic standard deviation of a set of data function. So now, I'm writing my own. This seems really tedious. What are you other guys doing? Invoking external DLLs with better math packages linked in?