True Range¶

Definition¶

The True Range (TR) indicator is a technical tool that calculates the volatility of currency pairs over a specified period. It is especially useful for identifying price fluctuations, helping traders understand market dynamics and potential price movements. The TR results indicate market volatility by showing the greatest price movement over the selected period. This insight helps traders adapt their strategies according to prevailing market conditions.

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History¶

The TR indicator was developed by J. Welles Wilder Jr. and introduced in his 1978 book "New Concepts in Technical Trading Systems". Wilder created this indicator to address the limitations of traditional range-based volatility measures by factoring in gaps and price changes between sessions. It remains a foundational tool in technical analysis, especially for forex and commodity markets.

Calculations¶

The True Range value is determined as the greatest value of the following:

\[ TR = { Max\ [(H − L), (H - C_y), (L - C_y)] } \]

\(H\) – today's highest price

\(L\) – today's lowest price

\(C_y\) – yesterday's closing price

Interpretation¶

The TR indicator primarily reflects market volatility. It does not have divergence and convergence or other kinds of patterns. Instead, it is interpreted through rising and falling values:

• A rising TR indicates increasing volatility, often signalling potential market instability or breakouts.

• A falling TR suggests reduced volatility, typically pointing to consolidation or quieter market conditions.

This helps traders anticipate breakouts from periods of low volatility and adjust their strategies accordingly.

Application¶

• Stop-loss placement – traders often place a stop loss beyond the recent TR values to account for market volatility, reducing the chance of premature exits.

• Confirming trades – the TR helps in combining with other indicators like the Average True Range (ATR) to set volatility-based exit points or confirm trade setups by identifying when the market is prone to significant price movements.

Limitations¶

The TR indicator reflects only volatility, offering no direct buy or sell signals. It can be reactive rather than predictive, as a rising TR indicates volatility after it occurs. The TR may also generate noise during erratic market conditions, making it less effective without complementary indicators or strategies for confirmation.

Summary¶

The True Range indicator measures market volatility by capturing the largest price movement between a currency pair's high, low and previous close. It helps traders to understand price fluctuations and potential market instability. The TR is widely used for stop-loss placement, exit strategies and as part of volatility-based trading systems.