diff --git a/indicators/internal-bar-strength/README.md b/indicators/internal-bar-strength/README.md
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--- a/indicators/internal-bar-strength/README.md
+++ b/indicators/internal-bar-strength/README.md
@@ -1,3 +1,15 @@
 # Internal Bar Strength
 
+The **Internal Bar Strength (IBS)** indicator measures the relative strength of a bar's close compared to its range.
+
+The formula for calculating the IBS is as follows:
+
+```
+IBS = (Close - Low) / (High - Low)
+```
+
+The value of the IBS ranges between 0 and 1.
+
+If the close of the bar is at the low, the value will be 0, and if the close is at the high, it will be 1.
+
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