True Range and Wilder ATR Calculator from OHLC
Calculate true range and Wilder-smoothed ATR from chronological OHLC rows, with explicit previous close, initialization, and per-bar CSV output.
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Measure historical price movement while including gaps from the previous close. Paste chronological OHLC bars and the close before the first bar. The tool shows the latest true range, Wilder ATR, and ATR as a percentage of the final close.
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