Which order type ensures the best execution?

During regular market hours, the exchange matches your order based on price-time priority. This indicates that orders are fulfilled using a queuing system (first-come, first-served).

If orders have been placed ahead of you, your order will only be filled if the orders preceding it are satisfied. Order execution could be challenging if you trade illiquid or circuit-limited equities.

To skip the line, do the following:

• Place an AMO - Limit/Market order after 3:45 p.m. (Market orders have a higher likelihood of fulfilment.)
• Before the market begins, or at 9:00 a.m., place a market or limit order.
• Pre-market orders are more likely to be filled than AMOs. Although you don't have to wait for pre-market hours to place an AMO, you can do so at any time between 3:45 PM and 8:57 AM on the NSE and 3:45 PM to 8:59 AM on the BSE.

There is no assurance that your order will be executed, whether you make an AMO or a pre-market order. All brokers agree that this is accurate.