1
EMA basis
A common modern Keltner formulation centers the channel on an exponential moving average.
Lesson · Technical Indicators
Keltner Channels
Construct an EMA-centered ATR envelope, change the basis and volatility settings, compare Keltner Channels with Bollinger Bands, and define channel-break conditions precisely.
Synthetic educational data
Core concepts
Understand what the indicator calculates, how its parameters affect it, and what it cannot establish by itself.
2
ATR envelope
Outer bands are placed a selected ATR multiple above and below the basis.
3
Different volatility input
Keltner Channels use average true range, while Bollinger Bands use standard deviation. They can contract and expand differently.
Interactive lesson
Change the inputs, inspect the calculation, and compare the indicator with the underlying price data.
Price with channelATR-based envelope
Channel widthEMA 20 · ATR 10 · 2.0×
Build a Keltner Channel
Document the exact formulation because historical and platform variants exist.
1
Choose the centerline
Select the EMA source and period.
2
Calculate ATR
Choose the true-range smoothing period and convention.
3
Set the multiplier
Place the upper and lower bands at a fixed ATR multiple from the EMA.
4
Define the event
Use an exact close, intrabar touch, re-entry, slope, or width condition rather than the word breakout alone.
ATR-based channel behavior
Score 0 / 0Choose the best answer.
Lesson rule
Keltner Channels are an ATR-based volatility envelope. Specify the exact formulation and event because the name alone is not a complete rule.
Common mistakes
1
Assuming every implementation is identicalBasis type, ATR period, multiplier, and historical formulations can differ.
2
Calling a channel touch a confirmed breakoutA touch, intrabar trade, and completed close outside are different events.
3
Treating Keltner and Bollinger envelopes as interchangeableATR and standard deviation respond differently to gaps and dispersion.
Completion standard
✓
Finish when you can reproduce the full channel.
Calculate the EMA basis and ATR, place both bands, compare width with Bollinger Bands on the same data, and state the exact event your rule uses.
Calculation note: This course uses the modern EMA ± multiplier × Wilder ATR formulation. Other Keltner definitions exist, so verify the implementation before comparing values.