Well, I'll tell you what I use...
Personally, I like using daily bars and holding on the one to two week timeframe. Almost all of my successful systems are volatility-based ones that are basically breakout systems. Fundamentals are important only if I take a one-direction bias, but I usually use both longs and shorts so that I don't have to care which direction the price breaks. Paper trading of each successful system lasted for months or years.
That said, I want to emphasize that the real key to successful trading is more with the process and with your psychology than with such-and-such indicator.
I have traded several different types of systems in the past, and in every case that I did well, there were these characteristics in common:
1) I had backtested the system rigorously to scientific (statistical) standards.
2) I had designed the system to match my psychological profile and my mental and emotional capabilities.
3) I paper-traded the system until there was "beyond a reasonable doubt" that it would work and that I could trade it as it was designed and backtested to operate.
Makes sense, right? Even if you got the Holy Grail of indicators, it wouldn't do you any good if you couldn't actually make yourself use it properly. I've watched guys self-destruct with good, reliable systems that they couldn't follow (thanks to fear, greed, hope or laziness).
Likewise, I've watched guys who are on top of the mental
game crash and burn by using systems or methodologies that just don't have a proven reproducible edge.
Develop and master your process and your psyche and you will succeed.