i've done some initial efforts into money market analytics, but the market changes too rapidly to get a good predictive heuristic made that can adapt.
The best I could get was around a 70% confidence of when the "christmas effect" in the US market would take action, and when it would cease. I couldn't get a very good confidence margin at all for how pronounced the effect would be (using simple first principles)-- and so I couldnt determine what the ideal formula for exploiting the christmas effect on US currency valuations was in terms of entry, incubation, and exit dates and times, and the expected returns.
That makes intelligent investment very hard.
The stock market is balls-crazy in comparison to the comparatively calm and graceful currency market. I would never dream of trying to predict major trends there. way outside my league.
As for how much you *need* to start using a money market investment strategy, my bank has a minimum of 500 dollars investment. It is theoretically possible for reasonably poor people to begin investing with money markets, if they self-educate-- but I warn, IT IS VERY HARD. Not impossible-- but to get "big big returns" in the currency market, you have to be very clever indeed. You can use it as an incubator to build a small slush fund to start the more risky stock market trading though.