IMHO there are two reasons.
Confusion and lack of discipline.
The confusion can be improved if you use only three different kind of indicators. for every aspect there should be at least one (but can also be two or three which should confirm each other).
- a trend finder i (like MACD histogram)
- a trigger i (like MA-crossover)
- a breakout i (like TL-break)
if all three kinds of inicators are in one timeframe even better.
The requiered discipline should keep you out of everything which is not within this plan.
Confusion and lack of discipline.
The confusion can be improved if you use only three different kind of indicators. for every aspect there should be at least one (but can also be two or three which should confirm each other).
- a trend finder i (like MACD histogram)
- a trigger i (like MA-crossover)
- a breakout i (like TL-break)
if all three kinds of inicators are in one timeframe even better.
The requiered discipline should keep you out of everything which is not within this plan.
/ ... clarifying decisions ... /