diff --git a/strategies/internal_bar_strength.py b/strategies/internal_bar_strength.py
new file mode 100644
index 0000000..4cfa0c9
--- /dev/null
+++ b/strategies/internal_bar_strength.py
@@ -0,0 +1,9 @@
+from pandas import DataFrame, Series
+
+def signals(data: DataFrame) -> Series:
+    """
+    Calculate the Internal Bar Strength (IBS) signal.
+    Returns a Series with 'L' for long signals and 'N' otherwise.
+    """
+    ibs_series = (data['Close'] - data['Low']) / (data['High'] - data['Low'])
+    return ibs_series.apply(lambda ibs: 'L' if ibs < 0.2 else 'N')