Trading with 150 lots

Im still in a dilema as to what will happen if my trade lot is more, I.e 150 lots crude oil…im sure there will be impact loss if I place market order, but if I keep limit order it might not get executed fully.how to avoid this. even if I trade in small lots, everything might not get executed at a particular price

There is no simple solution to this. You either have to break your one big order and place smaller ones, one by one or else doe either of what you have mentioned.

Btw, Crude is a global commodity with huge amounts of liquidity. My guess is that getting in and out of 150 lots shouldnt be an issue.