Thank you all for your suggestions...
I am not trying to time the market using the fundamentals. I am sure that there are people who can do that, and we can find them on Forbes list. I am not there
yet 
What I am trying to do is to develop a system that will give me the probabilities of the market direction for the next quarter, 6 months or a year based on economic indicators. I will still use my 100% mechanical system to trade, but the position sizes will vary not only based on short-term volatility, but also on a set of probabilities given by the economic indicators. If the short-term system gives me a buy signal, but the long term one (developed on econ indicators, market interrelationships, etc) favors short side, I will still go long, but on a smaller scale.
May be the idea is absurd...
BTW, M3 idea sounds interesting, what is the rationale though?
DVB
I am not trying to time the market using the fundamentals. I am sure that there are people who can do that, and we can find them on Forbes list. I am not there

What I am trying to do is to develop a system that will give me the probabilities of the market direction for the next quarter, 6 months or a year based on economic indicators. I will still use my 100% mechanical system to trade, but the position sizes will vary not only based on short-term volatility, but also on a set of probabilities given by the economic indicators. If the short-term system gives me a buy signal, but the long term one (developed on econ indicators, market interrelationships, etc) favors short side, I will still go long, but on a smaller scale.
May be the idea is absurd...
BTW, M3 idea sounds interesting, what is the rationale though?
DVB