Great question!

We have it doing a couple different strategies, but only publishing the classic Turtle Trading rules right now.

We'll let folks view the different strategies here pretty soon, but for starters the "Turtle Classic" looks something like this:

1) if the current price ever crosses above or below the highest or lowest price of the past 20 days (for a small trend) or the past 55 days (big trend), signal a buy/sell
2) if a signal to buy triggers from a small trend (the 20 day version) and the previous trend was also a small one, skip it

It doesn't take into consideration whipsaw stuff (an initial pullback of price after the start of a trend), so it's more of a medium/long term strategy.

I'll be publishing some more short term ones, including a daytrading one here soon : )