Is there a way (or an indicator) to mark a candle/wick when it has reached a certain standard deviation?
In the example below, the
- green crosses mark a closed candle that has touched or exceeded the 2-standard deviation lower Bollinger (green line).
- pink dots mark a closed candle that has touched or exceeded the 3-standard deviation Bollinger (pink line)
- on that same extreme candle, the "4" and "5" mark the candle reaching the 4th and 5th standard deviation levels, in addition to the 3rd SD. So it can be clearly seen that that specific candle was very statistically aberrant.

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