diff --git a/pkg/migrations/mysql/main_20240531163411_trades_created.go b/pkg/migrations/mysql/main_20240531163411_trades_created.go
new file mode 100644
index 000000000..121f56024
--- /dev/null
+++ b/pkg/migrations/mysql/main_20240531163411_trades_created.go
@@ -0,0 +1,33 @@
+package mysql
+
+import (
+	"context"
+
+	"github.com/c9s/rockhopper/v2"
+)
+
+func init() {
+	AddMigration("main", up_main_tradesCreated, down_main_tradesCreated)
+}
+
+func up_main_tradesCreated(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
+	// This code is executed when the migration is applied.
+	_, err = tx.ExecContext(ctx, "ALTER TABLE `trades` ADD COLUMN `inserted_at` DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL AFTER `traded_at`;")
+	if err != nil {
+		return err
+	}
+	_, err = tx.ExecContext(ctx, "UPDATE `trades` SET `inserted_at`=`traded_at`;")
+	if err != nil {
+		return err
+	}
+	return err
+}
+
+func down_main_tradesCreated(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
+	// This code is executed when the migration is rolled back.
+	_, err = tx.ExecContext(ctx, "ALTER TABLE `trades` DROP COLUMN `inserted_at`;")
+	if err != nil {
+		return err
+	}
+	return err
+}
diff --git a/pkg/migrations/sqlite3/main_20240531163411_trades_created.go b/pkg/migrations/sqlite3/main_20240531163411_trades_created.go
new file mode 100644
index 000000000..00599df28
--- /dev/null
+++ b/pkg/migrations/sqlite3/main_20240531163411_trades_created.go
@@ -0,0 +1,29 @@
+package sqlite3
+
+import (
+	"context"
+
+	"github.com/c9s/rockhopper/v2"
+)
+
+func init() {
+	AddMigration("main", up_main_tradesCreated, down_main_tradesCreated)
+}
+
+func up_main_tradesCreated(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
+	// This code is executed when the migration is applied.
+	_, err = tx.ExecContext(ctx, "ALTER TABLE trades ADD COLUMN inserted_at TEXT;\nUPDATE trades SET inserted_at = traded_at;\nCREATE TRIGGER set_inserted_at\nAFTER INSERT ON trades\nFOR EACH ROW\nBEGIN\n    UPDATE trades\n    SET inserted_at = datetime('now')\n    WHERE rowid = NEW.rowid;\nEND;")
+	if err != nil {
+		return err
+	}
+	return err
+}
+
+func down_main_tradesCreated(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
+	// This code is executed when the migration is rolled back.
+	_, err = tx.ExecContext(ctx, "DROP TRIGGER set_inserted_at;\nALTER TABLE trades DROP COLUMN inserted_at;")
+	if err != nil {
+		return err
+	}
+	return err
+}