>>>>When Don Carlson first published his MA cross-over Filter there was just one moving average to consider rather than two. I do not remember hat Don changed this to two MA's. The idea behind it is of course quite logical and is a formalized means of a Trade Delay procedure. A
What is the principal rationality of using two MA's? <<<<
Now that you mention it, I may have heard of using AIM with ONE moving average, but I got confused by what I have read in regard to technical analysis where I have seen two moving averages used as a trade signal.