The only indicator I use is RSI and casually. If I did not have it, I would not miss it much. Perhaps Im wasting my time with it, who knows.
Fibonacci is quite useful to me, that one I would miss.
Trend, support and resistance is key.
Read many books on volume, never managed to use it to my advantage so I killed it from my charts.
I think technical analysis is a true edge, those that badmouth it just don't understand it.
The biggest impediment in trading is psychology, particularly when you want to increase size.
Nexen