are there any non daytrading non optimized systems that have better than 50 percent win rate?
(independently tested and verified for a portfolio and at least 10 years?)
Yes, a lot... do some research. Intraday... or scalping systems require a high profitability to start off with... The nature of the system is generally, counter-trend... take profits, take loss...
Different from your systems that you trade... if you trade.
I do reseach but there is so much clutter and falsehood out there that I don't even look very seriously. I do not trade - I invest and I sell if I must.
are there any non daytrading non optimized systems that have better than 50 percent win rate?
(independently tested and verified for a portfolio and at least 10 years?)
You might consider Zwieg's 4% swing system as applied to the Value Line Arithmetic Index. It seems to meet your request, although my testing does not qualify as "verified". But it seems to hold up well.
This attachment (.xls file) is from my Tradestation testing.
It's from his book: "Martin Zweig's Winning Wall on Street"-lots of good stuff in there. The 4% Swing is about as simple as it gets. Buy when the index rises 4% above its recent low; sell when it falls 4% below its recent high.
I believe it was originally published by Ned Davis.
A great book by Davis is "Being Right or Making Money".