Limit position size to only 5 in MNQ

If you can adjust my scaling position in MNQ to 5 in my next account I am pretty sure I would be able to pass the account. I struggle with scaling when my emotions are not right. I need to limit myself to only 5 contract. If Topstep can't help me with that simple request I would have to find another company because that's literally what is stopping me from doing better in trading