Repairing the batch helps you place fresh market orders for those stocks/orders that weren't filled so your smallcase can be complete. Once you click on 'Repair' from the orders page, you would see a preview of the stocks you're placing fresh orders for. After reviewing this, you can confirm the order.
This will only fix those orders arising due to the following reasons:
- You're trying at a point where there's liquidity for the stock
- You have added funds to your bank account