diff --git a/strategies/internal-bar-strength/README.md b/strategies/internal-bar-strength/README.md
index bb3cc8b..d18df2e 100644
--- a/strategies/internal-bar-strength/README.md
+++ b/strategies/internal-bar-strength/README.md
@@ -1,3 +1,5 @@
 # Internal Bar Strength
 
+This strategy is based on the [Internal Bar Strength (IBS) indicator](https://moshferatu.dev/moshferatu/ninjatrader/src/branch/main/indicators/internal-bar-strength).
+
 ---
\ No newline at end of file