I think there is a tradeoff when we come to simplicity vs performance. You tend to find these simple systems are more statistically robust and belie the common wisdom that all trading systems only work for a short period of time. I haven't really come across (and maybe I'm the outsider here!) any high performance systems (e.g. MAR over 1.5 - 2.) which last more than a few years in walkforward testing.
The question for traders (aside from the majority who think trading mechanically could never be profitable, usually because of a desire for control and inflated sense of their analytical abilities) is:
a) do I make hay while the sun shines and trade this high yielding system for all its worth
b) do I use an old fashioned, boring old system like an MA crossover or Donchian breakout, put up with long periods without equity highs etc but be very confident that in 5 years, 10 years, 15 years time you'll still have a healthy average annual profit
I believe this is one of those decisions that can make or break a trader. My main caution with a) is that when that system stops working, you can give up a lot of your profits before you say thats it. A system stoploss will always have to be around 30 - 40% loss of equity (depending on position sizing) to stop getting whipsawed during normal drawdowns, which means when it does stop working, it really stops! On the other hand your boring old MA crossover will still be chugging along. Its a case of the tortoise and the hare!
I thought I'd just try something with option A. Lets look back at Futures Truth at the Top 10 systems since release date from 2004 (using the Internet Wayback machine) and see how they've performed since (the % is that given on their site at the time, which is annualised returns. I've put their total annual profit according to Futures Truth for each year since in brackets afterwards (i.e. 2005,2006,2007,2008,2009)
1. Mesa T-Notes 174.0% (-2350, -2575, 5408, -11679, 2446)
2. EuroTrader 139.3% (This system has vanished)
3. Anticipation 130.2% (This system has vanished)
4. R-Mesa 3 120.2% (This system has vanished replaced by R-Mesa 5)
5. Balance Point 110.1% (-8025, -24425, -5300, 63700, 550)
6. %C Daybreaker 104.2% (-10675, 21375, -8600, 37350, 27375)
7. I-Master 95.2% (-114425, -69775, 109525, 413935, -42726)
8. Market Rider 89.7% (vanished)
9. Dollar Trader for Currencies 85.4% (3511, -10064, 28713, 21540, -16366)
10. R-Breaker 77.6% (-20475, -7100, 42425, 8350, 9750)
There are definitely some profitable systems in there (I'm cautious with results from 2008 because that was such an unusual year). Many have vanished interestingly. You've got to ask yourself, at the end of 2006 would I still be trading I-Master, or R-Breaker?
I'd go with an option B approach. The one I'd have the most confidence in would be Dollar Trader - been around for 13 years at the time with profitable results, simple idea and fully disclosed. However I wouldn't have made the most money in the past five years. It will be interesting to look again in 2015 and see if that would have been the right longterm decision!
In the same way, I'd have a lot more confidence in five years that the dual MA would be making me money (on a diverse portfolio) than the latest genetic algorithm 15 indicator Ichimoku chaos based system