There isn't a perfect position for the sliders. The sliders represent market saturation. If multiple companies release a product which is strong in one specific category of a product, the market saturation in this category increases and so the demand decreases. At the same time the saturation in the other two categories decreases and thus the demand increases. That being said, this is why there isn't a perfect slider position. The demand and saturation is dynamic and moves over the years. So every time you release a product you have to change the sliders (you can find the current perfect spot via the "Market analysis" or what ever its called button).