Hi Squashthebug, Tofuzzy is on the right track, but let me take a whack at it. Ok you know that portfolio control (PC)determines when we buy or sell, but you want to get more into it. When ever stock value (SV} is the same as PC AIM is happy, this is what I call the neutral point. Now then we want to know at what price the neutral point is set at. That is easy, just take PC and divide it by the number of shares you have. So you can see, each time you sell shares you change the price of the neutral point. As the stock price starts to go above the neutral point AIM starts to feel the desire to sell, when the stock price reaches SAFE he can hardly keep his pants on, he is starting to sweet talk you. When the stock price reaches (SAFE plus MINIMUM SELL AMOUNT), AIM is now into full foreplay! HE is ready to SELL, not only that he is ready to SELL and SELL and SELL, if the stock price keeps going up! Thats why all the girls like him! And there you have it the ADULT version of AIM. By the way AIM likes different positions, some times he likes to BUY and BUY and BUY.