How to place orders in MCX intraday using Cover Orders

Suppose I trade in Natural Gas Intraday with Cover Order type.As per my knowledge in NG I can place 16 lots per single order or 2.5% of OI. Lets take 16 lots per single order.

  1. But I want to BUY 20 lots with the same price and at the same time.So how do I will do that?

  2. I want to SELL that 20 lots with the same price and at the same time. So how do I will do that?

Not possible to place one order. You will have to break it into two orders.