diff --git a/supabase/migrations/00018_rls_public_read.sql b/supabase/migrations/00018_rls_public_read.sql
new file mode 100644
index 00000000..46290e09
--- /dev/null
+++ b/supabase/migrations/00018_rls_public_read.sql
@@ -0,0 +1,8 @@
+-- trade_history: public read for price charts
+create policy "Public read" on public.trade_history for select using (true);
+
+-- backfill_failures: public read for diagnostics
+create policy "Public read" on public.backfill_failures for select using (true);
+
+-- backfill_cursor: public read for status checks
+create policy "Public read" on public.backfill_cursor for select using (true);