Thanks jcl.

However, your statements are contradictory. Clearly what I do with the profits affects the performance of the strategy if I remove more than the square root of the capital growth.

But, I actually don't follow what you're saying. The manual talks about the square root in terms of reinvesting profits, and says the Z strategies don't. Why, then, for a Z strategy or any strategy which doesn't reinvest, can't 100% of the profits be removed?

Also, if it's the other way around and the square root thing applies to removing profits in non-reinvesting strategies, then the Monthly Income displayed by the Performance Report is not correct, is it? Since only 60% of that amount is available to be removed...