diff --git a/data/markov/db.sql b/data/markov/db.sql
index fa93651..97a717b 100644
--- a/data/markov/db.sql
+++ b/data/markov/db.sql
@@ -16,4 +16,6 @@ CREATE TABLE IF NOT EXISTS chain (
     FOREIGN KEY(user) REFERENCES user(id)
 );
 
-CREATE UNIQUE INDEX IF NOT EXISTS chain_value_next ON chain(user, value, next);
\ No newline at end of file
+CREATE UNIQUE INDEX IF NOT EXISTS chain_value_next ON chain(user, value, next);
+
+CREATE INDEX IF NOT EXISTS markov_all_index ON chain(value);