Hi Quarel; I an trying an AIM type scaling project on the cubes (QQQ).....my approach is to set GTC buys and sells at a 10% deviation from the last executed price. I buy or sell the quantity of 10% of the total shares, when the 10% price deviation occurs......I use the AIM software to keep track of the latest buy/sell prices, but use the 10% share quantity to trade, rather than the AIM reccomendation....so it is not AIM-like, except for the help in keeping track of where the price is......
I decided to try this on a portion of the portfolio because I noticed that even in a sustained move in one direction, there is often a move in the other direction that can capture at least a 10% move....and by that means increase the amount of selling at LIFO gains.
You mention something in your post about 90%.....would you please explain that in more detail? It may be that our purposes are different.....I am looking at QQQ as a long term position......it sounds as though you are planning to exit completely after some percentage gain.....have I gotten that right?