diff --git a/tr.rs b/tr.rs
deleted file mode 100644
index e0c096af..00000000
--- a/tr.rs
+++ /dev/null
@@ -1,191 +0,0 @@
-use core::prelude::*;
-
-pub fn tr(high: &Price, low: &Price, close: &Price) -> Price {
-    let prev_close = close.shift(1);
-    let diff = high - low;
-
-    iff!(
-        high.shift(1).na(),
-        diff,
-        diff.max(&(high - &prev_close).abs())
-            .max(&(low - &prev_close).abs())
-    )
-}
-
-pub fn wtr(high: &Price, low: &Price, close: &Price) -> Price {
-    let prev_close = close.shift(1);
-    let diff = high - low;
-
-    iff!(
-        high.shift(1).na(),
-        diff,
-        diff.max(&(high - &prev_close))
-            .max(&(low.negate() + &prev_close))
-    )
-}
-
-pub fn atr(
-    high: &Price,
-    low: &Price,
-    close: &Price,
-    smooth: Smooth,
-    period: Period,
-) -> Price {
-    tr(high, low, close).smooth(smooth, period)
-}
-
-pub fn snatr(
-    atr: &Price,
-    period: Period,
-    smooth: Smooth,
-    period_smooth: Period,
-) -> Price {
-    atr.normalize(period, SCALE).smooth(smooth, period_smooth)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_true_range() {
-        let high = Series::from([
-            6.5600, 6.6049, 6.5942, 6.5541, 6.5300, 6.5700, 6.5630, 6.5362, 6.5497, 6.5480, 6.5325,
-            6.5065, 6.4866, 6.5536, 6.5142, 6.5294,
-        ]);
-        let low = Series::from([
-            6.5418, 6.5394, 6.5301, 6.4782, 6.4882, 6.5131, 6.5126, 6.5184, 6.5206, 6.5229, 6.4982,
-            6.4560, 6.4614, 6.4798, 6.4903, 6.5066,
-        ]);
-        let close = Series::from([
-            6.5541, 6.5942, 6.5348, 6.4950, 6.5298, 6.5616, 6.5223, 6.5300, 6.5452, 6.5254, 6.5038,
-            6.4614, 6.4854, 6.4966, 6.5117, 6.5270,
-        ]);
-        let expected = vec![
-            0.01819992,
-            0.06549978,
-            0.064100266,
-            0.07590008,
-            0.041800022,
-            0.056900024,
-            0.050400257,
-            0.017799854,
-            0.029099941,
-            0.025099754,
-            0.03429985,
-            0.050499916,
-            0.02519989,
-            0.07379961,
-            0.023900032,
-            0.022799969,
-        ];
-
-        let result: Vec<Scalar> = tr(&high, &low, &close).into();
-
-        assert_eq!(result.len(), close.len());
-        assert_eq!(result, expected);
-    }
-
-    #[test]
-    fn test_wtrue_range() {
-        let high = Series::from([
-            6.5600, 6.6049, 6.5942, 6.5541, 6.5300, 6.5700, 6.5630, 6.5362, 6.5497, 6.5480, 6.5325,
-            6.5065, 6.4866, 6.5536, 6.5142, 6.5294,
-        ]);
-        let low = Series::from([
-            6.5418, 6.5394, 6.5301, 6.4782, 6.4882, 6.5131, 6.5126, 6.5184, 6.5206, 6.5229, 6.4982,
-            6.4560, 6.4614, 6.4798, 6.4903, 6.5066,
-        ]);
-        let close = Series::from([
-            6.5541, 6.5942, 6.5348, 6.4950, 6.5298, 6.5616, 6.5223, 6.5300, 6.5452, 6.5254, 6.5038,
-            6.4614, 6.4854, 6.4966, 6.5117, 6.5270,
-        ]);
-        let expected = vec![
-            0.01819992,
-            0.06549978,
-            0.064100266,
-            0.07590008,
-            0.041800022,
-            0.056900024,
-            0.050400257,
-            0.017799854,
-            0.029099941,
-            0.025099754,
-            0.03429985,
-            0.050499916,
-            0.02519989,
-            0.07379961,
-            0.023900032,
-            0.022799969,
-        ];
-
-        let result: Vec<Scalar> = wtr(&high, &low, &close).into();
-
-        assert_eq!(result.len(), close.len());
-        assert_eq!(result, expected);
-    }
-
-    #[test]
-    fn test_atr_smma() {
-        let high = Series::from([
-            6.5600, 6.6049, 6.5942, 6.5541, 6.5300, 6.5700, 6.5630, 6.5362, 6.5497, 6.5480, 6.5325,
-            6.5065, 6.4866, 6.5536, 6.5142, 6.5294,
-        ]);
-        let low = Series::from([
-            6.5418, 6.5394, 6.5301, 6.4782, 6.4882, 6.5131, 6.5126, 6.5184, 6.5206, 6.5229, 6.4982,
-            6.4560, 6.4614, 6.4798, 6.4903, 6.5066,
-        ]);
-        let close = Series::from([
-            6.5541, 6.5942, 6.5348, 6.4950, 6.5298, 6.5616, 6.5223, 6.5300, 6.5452, 6.5254, 6.5038,
-            6.4614, 6.4854, 6.4966, 6.5117, 6.5270,
-        ]);
-        let period = 3;
-        let expected = [
-            0.01819992,
-            0.03396654,
-            0.044011116,
-            0.05464077,
-            0.05036052,
-            0.05254035,
-            0.051826984,
-            0.040484603,
-            0.036689714,
-            0.032826394,
-            0.033317544,
-            0.039045,
-            0.03442996,
-            0.047553174,
-            0.03966879,
-            0.03404585,
-        ];
-
-        let result: Vec<Scalar> = atr(&high, &low, &close, Smooth::SMMA, period).into();
-
-        assert_eq!(result, expected);
-    }
-
-    #[test]
-    fn test_snatr() {
-        use crate::atr;
-
-        let high = Series::from([
-            19.129, 19.116, 19.154, 19.195, 19.217, 19.285, 19.341, 19.394, 19.450,
-        ]);
-        let low = Series::from([
-            19.090, 19.086, 19.074, 19.145, 19.141, 19.155, 19.219, 19.306, 19.355,
-        ]);
-        let close = Series::from([
-            19.102, 19.100, 19.146, 19.181, 19.155, 19.248, 19.309, 19.355, 19.439,
-        ]);
-        let atr_period = 3;
-        let atr = atr(&high, &low, &close, Smooth::SMMA, atr_period);
-        let period = 3;
-        let expected = [
-            0.0, 0.0, 50.0, 82.575455, 99.49475, 99.747375, 100.0, 90.14032, 55.201355,
-        ];
-
-        let result: Vec<Scalar> = snatr(&atr, atr_period, Smooth::WMA, period).into();
-
-        assert_eq!(result, expected);
-    }
-}