diff --git a/bindings/python/python/wickra/__init__.pyi b/bindings/python/python/wickra/__init__.pyi
index 236b480f..87d8611a 100644
--- a/bindings/python/python/wickra/__init__.pyi
+++ b/bindings/python/python/wickra/__init__.pyi
@@ -190,7 +190,7 @@ class CCI:
     def period(self) -> int: ...
 
 class ROC:
-    def __init__(self, period: int) -> None: ...
+    def __init__(self, period: int = 10) -> None: ...
     def update(self, value: float) -> Optional[float]: ...
     def batch(self, prices: NDArray[np.float64]) -> NDArray[np.float64]: ...
     def reset(self) -> None: ...
@@ -242,7 +242,7 @@ class MFI:
     def warmup_period(self) -> int: ...
 
 class TRIX:
-    def __init__(self, period: int) -> None: ...
+    def __init__(self, period: int = 30) -> None: ...
     def update(self, value: float) -> Optional[float]: ...
     def batch(self, prices: NDArray[np.float64]) -> NDArray[np.float64]: ...
     def reset(self) -> None: ...
diff --git a/bindings/python/src/lib.rs b/bindings/python/src/lib.rs
index 8bf108f4..4c306bd6 100644
--- a/bindings/python/src/lib.rs
+++ b/bindings/python/src/lib.rs
@@ -836,6 +836,7 @@ struct PyRoc {
 #[pymethods]
 impl PyRoc {
     #[new]
+    #[pyo3(signature = (period=10))]
     fn new(period: usize) -> PyResult<Self> {
         Ok(Self {
             inner: wc::Roc::new(period).map_err(map_err)?,
@@ -1054,6 +1055,7 @@ struct PyTrix {
 #[pymethods]
 impl PyTrix {
     #[new]
+    #[pyo3(signature = (period=30))]
     fn new(period: usize) -> PyResult<Self> {
         Ok(Self {
             inner: wc::Trix::new(period).map_err(map_err)?,