TRANGE

Summary

True Range: the greatest of today's high-low span and the two gaps between yesterday's close and today's high/low. Base volatility measure used to build ATR/NATR. Larger values mean wider or gappier bars (higher volatility).

Formula

TR = max( high - low, |prevClose - high|, |prevClose - low| )

Notes

The first bar produces no value because it has no prior close; unlike some definitions, it does not fall back to the high-low range for that bar.

Inputs

inHigh — High price of each bar
inLow — Low price of each bar
inClose — Close price of each bar

Outputs

outReal — True Range value per bar

Properties

Numerical Stability: Start-Independent

Display Flags
☐ Overlap Input
✅ Independent Y-Axis i
☐ Candlestick

Implementation

TA-Lib Definition: trange.c · trange.yaml

Native	File
C	`ta_TRANGE.c`
Rust	`trange.rs`
Java	`Core_TRANGE.java`

TA-Lib is also available for Python, R and more using a wrapper.

Aliases

True Range, TR

References

J. Welles Wilder, New Concepts in Technical Trading Systems, Trend Research (ISBN 0894590278)