If you can't use Technical or Fundamental analysis, what's left? Forums perhaps, magazines, seminars, or gut-feel?
Personally I find RSI to be a good little indicator in many situations. Designed to measure overbought / sold conditions and does so very well, hence why it has been popular for so long. Also does a good job of detecting weakening trends through divergence.
Others mentioned I don't practice so I won't comment on their worth or lack of.
NAG Price at posting:
6.0¢ Sentiment: Buy Disclosure: Held
