One-indicator trading: if you could keep only one, which?

Strip the chart to a single indicator and it has to earn its place: moving average for trend, RSI for momentum, ATR for volatility, Bollinger for extremes. The choice reveals your whole approach.

Which do you keep?

• the indicator and how you'd trade with only it
• what you lose without the others
• the experiment that taught you minimalism

The moving averages, RSI and ATR guides cover the candidates.