I guess this is how I view simple. It should have only a few variables, and then you take a trade, and if you keep consistent stop and target, the trade hits one or the other. Trade management would be a huge part of this, and I think is a huge edge overall. Some might say its not an edge on its own, which is true, but without a sound and consistent approach with trade management, you might be the best trader and still lose money.
Once you introduce too many variables, I'm just not sure how you end up taking any trades because the setups would be so rare. To combat this, you may have many setups, and although quite rare, perhaps at least one presents every hour, even if it might not show up for the rest of the week. Now of course you have to keep track of them all in your head.
But the thing for me is that once you see stats on these trades, if they aren't so good, you almost have to wonder how profitable are these setups. If you first have to consider the general market sentiment, then the price in relation to the overnight action, then the price in relation to the previous day action, then you throw in some rules about how close to have to be to a previous swing point before you enter, and then you have to factor in time of day, etc., and then after all this you place your trade and hit 2 points profit before your 2 point stop is hit, how much of this winning trade can we contribute to all this analysis? There are literally tons of areas on the chart where you can take a 2 point trade that set up with so much analysis.
I figure that all this extra analysis should provide a hugely juicy win rate. If on a 1:1 trade you're only getting 60% win rate, and on a 1:2 barely cracking 40%, then is this the result of superior trade selection via countless variables, or perhaps a bit of luck, good timing, and trading in the direction of the trend?
I guess the point that I'm trying to make is that often times, trades are over complicated in order bring about the appearance of good trading. What results from this is the need to be right, given all the analysis, and perhaps even less opportunities to trade, since you're constrained by all the rules. Contrast this with a more simple system, which may produce more trades, but as long as the trade management is top notch, it might actually result in more profits, even if it seems worse because many trades end up being losers.
Its of course difficult to know any of this since so little trade stats are shared, but from all the sources I have been able to reference over the years, I am very much leaning to this conclusion.