diff --git a/README.md b/README.md
index 5e307971a1..3f86f15a61 100644
--- a/README.md
+++ b/README.md
@@ -210,3 +210,11 @@ To run style checking run `make style`.
 * results/small/ -> Contains all the results for the small analysis.
 
 * jars/ -> Location for the IntelliMerge and Spork jars.
+
+
+## Comparing merge algorithms
+
+To investigate differences between two mergers:
+ * edit file `src/python/select_from_results.py` to reflect the differences you are interested in.
+ * run `src/python/select_from_results.py` to create a .csv database containing only the differences.
+ * run `src/python/replay_merge.py --merges_csv CSV_FILE --idx INDEX` (maybe add `-test`) for the index of the merge you are interested in.