diff --git a/indicators/put-call-ratio/README.md b/indicators/put-call-ratio/README.md
new file mode 100644
index 0000000..5d3d7a4
--- /dev/null
+++ b/indicators/put-call-ratio/README.md
@@ -0,0 +1,14 @@
+# Put / Call Ratio
+
+The **Put / Call Ratio** is defined as follows:
+
+```
+Put / Call Ratio = Total Put Options Volume / Total Call Options Volume
+```
+
+This indicator requires an [IQFeed](https://www.iqfeed.net/) data subscription as it relies on the following market statistics symbols:
+
+* VPOT.Z - Option Put Volume Total
+* VCOT.Z - Option Call Volume Total
+
+---
\ No newline at end of file