diff --git a/core/src/indicators/mod.rs b/core/src/indicators/mod.rs
index dd0ef37..7bcae9c 100644
--- a/core/src/indicators/mod.rs
+++ b/core/src/indicators/mod.rs
@@ -37,6 +37,7 @@ mod sonar;
 mod stochf;
 mod stochrsi;
 mod stochs;
+mod trix;
 mod ultosc;
 mod vr;
 mod willr;
@@ -81,6 +82,7 @@ pub use sonar::*;
 pub use stochf::*;
 pub use stochrsi::*;
 pub use stochs::*;
+pub use trix::*;
 pub use ultosc::*;
 pub use vr::*;
 pub use willr::*;
diff --git a/core/src/indicators/trix.rs b/core/src/indicators/trix.rs
new file mode 100644
index 0000000..91f0ef8
--- /dev/null
+++ b/core/src/indicators/trix.rs
@@ -0,0 +1,164 @@
+use crate::indicators::ema::ema;
+
+pub fn trix(
+    data: &[Option<f64>],
+    period: usize,
+    signal_period: usize,
+) -> (Vec<Option<f64>>, Vec<Option<f64>>) {
+    let line = trix_line(data, period);
+    let signal = ema(&line, signal_period);
+
+    (line, signal)
+}
+
+pub fn trix_line(data: &[Option<f64>], period: usize) -> Vec<Option<f64>> {
+    let ema_values = ema(data, period);
+    let double_ema = ema(&ema_values, period);
+    let triple_ema = ema(&double_ema, period);
+
+    triple_ema
+        .iter()
+        .enumerate()
+        .map(|(idx, &current)| {
+            if idx == 0 {
+                return None;
+            }
+
+            match (current, triple_ema[idx - 1]) {
+                (Some(current), Some(previous)) if previous != 0.0 => {
+                    Some((current - previous) * 100.0 / previous)
+                }
+                _ => None,
+            }
+        })
+        .collect()
+}
+
+pub fn trix_signal(data: &[Option<f64>], period: usize, signal_period: usize) -> Vec<Option<f64>> {
+    let line = trix_line(data, period);
+    ema(&line, signal_period)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::indicators::ema::ema;
+    use crate::testutils;
+    use crate::utils::round_vec;
+
+    #[test]
+    fn test_trix() {
+        // Given
+        let test_cases = vec!["005930", "TSLA"];
+
+        // When
+        for symbol in test_cases {
+            let input = testutils::load_data(&format!("../data/{}.json", symbol), "c")
+                .into_iter()
+                .map(Some)
+                .collect::<Vec<_>>();
+            let (line, signal) = trix(&input, 12, 9);
+
+            let expected_line = testutils::load_expected::<Option<f64>>(&format!(
+                "../data/expected/trix_line_{}.json",
+                symbol
+            ));
+            let expected_signal = testutils::load_expected::<Option<f64>>(&format!(
+                "../data/expected/trix_signal_{}.json",
+                symbol
+            ));
+
+            // Then
+            assert_eq!(
+                round_vec(line, 8),
+                round_vec(expected_line, 8),
+                "TRIX line test failed for symbol {}.",
+                symbol
+            );
+            assert_eq!(
+                round_vec(signal, 8),
+                round_vec(expected_signal, 8),
+                "TRIX signal test failed for symbol {}.",
+                symbol
+            );
+        }
+    }
+
+    #[test]
+    fn test_trix_matches_composed_ema_across_gaps() {
+        // Given
+        let input = vec![
+            Some(1.0),
+            Some(2.0),
+            Some(3.0),
+            Some(4.0),
+            None,
+            Some(5.0),
+            Some(6.0),
+            Some(7.0),
+            Some(8.0),
+            Some(9.0),
+        ];
+
+        // When
+        let line = trix_line(&input, 2);
+        let single = ema(&input, 2);
+        let double = ema(&single, 2);
+        let triple = ema(&double, 2);
+        let expected = triple
+            .iter()
+            .enumerate()
+            .map(|(idx, &current)| {
+                if idx == 0 {
+                    return None;
+                }
+
+                match (current, triple[idx - 1]) {
+                    (Some(current), Some(previous)) if previous != 0.0 => {
+                        Some((current - previous) * 100.0 / previous)
+                    }
+                    _ => None,
+                }
+            })
+            .collect::<Vec<_>>();
+
+        // Then
+        assert_eq!(round_vec(line, 8), round_vec(expected, 8));
+    }
+
+    #[test]
+    fn test_trix_signal_follows_base_ema_contract_across_gaps() {
+        // Given
+        let input = vec![
+            Some(1.0),
+            Some(2.0),
+            Some(3.0),
+            Some(4.0),
+            None,
+            Some(5.0),
+            Some(6.0),
+            Some(7.0),
+            Some(8.0),
+            Some(9.0),
+        ];
+
+        // When
+        let (line, signal) = trix(&input, 2, 2);
+
+        // Then
+        assert_eq!(signal, ema(&line, 2));
+        assert_eq!(signal, trix_signal(&input, 2, 2));
+    }
+
+    #[test]
+    fn test_trix_returns_none_when_previous_triple_ema_is_zero() {
+        // Given
+        let input = vec![Some(0.0), Some(0.0), Some(1.0), Some(2.0)];
+
+        // When
+        let line = trix_line(&input, 1);
+
+        // Then
+        assert_eq!(line, vec![None, None, None, Some(100.0)]);
+    }
+}
diff --git a/data/expected/trix_line_005930.json b/data/expected/trix_line_005930.json
new file mode 100644
index 0000000..3b96b3a
--- /dev/null
+++ b/data/expected/trix_line_005930.json
@@ -0,0 +1,602 @@
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diff --git a/data/expected/trix_line_TSLA.json b/data/expected/trix_line_TSLA.json
new file mode 100644
index 0000000..b3b06d2
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diff --git a/data/expected/trix_signal_005930.json b/data/expected/trix_signal_005930.json
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diff --git a/data/expected/trix_signal_TSLA.json b/data/expected/trix_signal_TSLA.json
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diff --git a/polars/Cargo.toml b/polars/Cargo.toml
index 7ade7e9..7727875 100644
--- a/polars/Cargo.toml
+++ b/polars/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "polars_techr"
-version = "0.1.3"
+version = "0.1.4"
 edition = "2021"
 description = "Polars expression plugins for techr indicators"
 license = "MIT"
diff --git a/polars/README.md b/polars/README.md
index ddb00e1..201d35a 100644
--- a/polars/README.md
+++ b/polars/README.md
@@ -12,7 +12,7 @@ uv add techr
 
 - Price/trend: `sma`, `wma`, `ema`, `disparity`, `mom`, `roc`, `rsi`, `psl`
 - Bands/channels: `bband_middle`, `bband_lower`, `bband_upper`, `env_upper`, `env_middle`, `env_lower`, `pchan_upper`, `pchan_middle`, `pchan_lower`
-- Momentum/oscillators: `macd`, `macd_line`, `macd_signal`, `macd_hist`, `macd_histogram`, `ppo_line`, `ppo_signal`, `ppo_histogram`, `pvo_line`, `pvo_signal`, `pvo_histogram`, `sonar_line`, `sonar_signal`, `stochf_percent_k`, `stochf_percent_d`, `stoch_percent_k`, `stoch_percent_d`, `stochrsi_percent_k`, `stochrsi_percent_d`
+- Momentum/oscillators: `macd`, `macd_line`, `macd_signal`, `macd_hist`, `macd_histogram`, `ppo_line`, `ppo_signal`, `ppo_histogram`, `pvo_line`, `pvo_signal`, `pvo_histogram`, `sonar_line`, `sonar_signal`, `trix_line`, `trix_signal`, `stochf_percent_k`, `stochf_percent_d`, `stoch_percent_k`, `stoch_percent_d`, `stochrsi_percent_k`, `stochrsi_percent_d`
 - High/low/volume indicators: `ad`, `adx`, `adxr`, `aroon_up`, `aroon_down`, `aroonosc`, `atr`, `cci`, `cmf`, `co`, `cv`, `dmi_plus`, `dmi_minus`, `efi`, `eom_line`, `eom_signal`, `erbear`, `erbull`, `massi_line`, `massi_signal`, `mfi`, `nvi_line`, `nvi_signal`, `obv_line`, `obv_signal`, `psar`, `pvi_line`, `pvi_signal`, `ultosc`, `vr`, `willr`
 - Ichimoku: `ichimoku_base_line`, `ichimoku_conversion_line`, `ichimoku_leading_span_a`, `ichimoku_leading_span_b`, `ichimoku_lagging_span`
 
diff --git a/polars/src/expressions.rs b/polars/src/expressions.rs
index 849f6ca..e20b465 100644
--- a/polars/src/expressions.rs
+++ b/polars/src/expressions.rs
@@ -146,6 +146,12 @@ struct SonarSignalKwargs {
     signal_period: u32,
 }
 
+#[derive(Deserialize)]
+struct PeriodSignalKwargs {
+    period: u32,
+    signal_period: u32,
+}
+
 #[derive(Deserialize)]
 struct StochRsiKwargs {
     period_rsi: u32,
@@ -873,6 +879,25 @@ fn rsi(inputs: &[Series], kwargs: PeriodKwargs) -> PolarsResult<Series> {
     )))
 }
 
+#[polars_expr(output_type=Float64)]
+fn trix_line(inputs: &[Series], kwargs: PeriodKwargs) -> PolarsResult<Series> {
+    let input = series_to_f64_vec(&inputs[0])?;
+    Ok(option_vec_to_series(core::trix_line(
+        &input,
+        kwargs.period as usize,
+    )))
+}
+
+#[polars_expr(output_type=Float64)]
+fn trix_signal(inputs: &[Series], kwargs: PeriodSignalKwargs) -> PolarsResult<Series> {
+    let input = series_to_f64_vec(&inputs[0])?;
+    Ok(option_vec_to_series(core::trix_signal(
+        &input,
+        kwargs.period as usize,
+        kwargs.signal_period as usize,
+    )))
+}
+
 #[polars_expr(output_type=Float64)]
 fn sonar_line(inputs: &[Series], kwargs: SonarLineKwargs) -> PolarsResult<Series> {
     let input = series_to_f64_vec(&inputs[0])?;
diff --git a/polars/techr/__init__.py b/polars/techr/__init__.py
index 1153e66..e3ffb1d 100644
--- a/polars/techr/__init__.py
+++ b/polars/techr/__init__.py
@@ -77,6 +77,8 @@
     "stochf_percent_k",
     "stochrsi_percent_d",
     "stochrsi_percent_k",
+    "trix_line",
+    "trix_signal",
     "ultosc",
     "vr",
     "willr",
@@ -704,6 +706,18 @@ def rsi(expr: IntoExpr, *, period: int) -> pl.Expr:
     return _register("rsi", [expr], {"period": period})
 
 
+def trix_line(expr: IntoExpr, *, period: int) -> pl.Expr:
+    return _register("trix_line", [expr], {"period": period})
+
+
+def trix_signal(expr: IntoExpr, *, period: int, signal_period: int) -> pl.Expr:
+    return _register(
+        "trix_signal",
+        [expr],
+        {"period": period, "signal_period": signal_period},
+    )
+
+
 def sonar_line(expr: IntoExpr, *, period: int, step: int) -> pl.Expr:
     return _register("sonar_line", [expr], {"period": period, "step": step})
 
diff --git a/polars/tests/test_indicators.py b/polars/tests/test_indicators.py
index 8901f4c..d07d253 100644
--- a/polars/tests/test_indicators.py
+++ b/polars/tests/test_indicators.py
@@ -474,6 +474,12 @@ def select_expr(df: pl.DataFrame, expr: pl.Expr, alias: str, lazy: bool) -> pl.S
         lambda: ta.sonar_signal(pl.col("close"), period=9, step=6, signal_period=5),
         "sonar_signal",
     ),
+    ("trix_line", lambda: ta.trix_line(pl.col("close"), period=12), "trix_line"),
+    (
+        "trix_signal",
+        lambda: ta.trix_signal(pl.col("close"), period=12, signal_period=9),
+        "trix_signal",
+    ),
     (
         "stochrsi_percent_k",
         lambda: ta.stochrsi_percent_k(