"I let my minimum order size be a percentage of Portfolio Control, so each buy increases the size of the minimum order. That makes AIM look for a slightly lower price for the "next buy."
I've been using a percentage of stock value, which natrually diminishes as the falls.
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.