double_doji

ta_lib/patterns/src/double_doji.rs

@@ -0,0 +1,48 @@
+use core::series::Series;
+
+pub fn bullish(open: &[f64], close: &[f64]) -> Vec<bool> {
+    let open = Series::from(open);
+    let close = Series::from(close);
+
+    (close.shift(1).eq_series(&open.shift(1))
+        & close.shift(2).eq_series(&open.shift(2))
+        & close.shift(3).lt_series(&open.shift(3)))
+    .into()
+}
+
+pub fn bearish(open: &[f64], close: &[f64]) -> Vec<bool> {
+    let open = Series::from(open);
+    let close = Series::from(close);
+
+    (close.shift(1).eq_series(&open.shift(1))
+        & close.shift(2).eq_series(&open.shift(2))
+        & close.shift(3).gt_series(&open.shift(3)))
+    .into()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_double_doji_bullish() {
+        let open = vec![4.0, 4.0, 4.0, 4.0, 5.0];
+        let close = vec![5.0, 3.0, 4.0, 4.0, 6.0];
+        let expected = vec![false, false, false, false, true];
+
+        let result = bullish(&open, &close);
+
+        assert_eq!(result, expected);
+    }
+
+    #[test]
+    fn test_double_doji_bearish() {
+        let open = vec![4.0, 4.0, 4.0, 6.0, 5.0];
+        let close = vec![5.0, 5.0, 4.0, 6.0, 4.0];
+        let expected = vec![false, false, false, false, true];
+
+        let result = bearish(&open, &close);
+
+        assert_eq!(result, expected);
+    }
+}

ta_lib/patterns/src/lib.rs

@@ -3,5 +3,6 @@ pub mod blockade;
 pub mod bottle;
 pub mod counterattack;
 pub mod doji;
+pub mod double_doji;
 pub mod marubozu;
 pub mod tasuki;