The higher the leverage, the better it is.
Then you just deposit a tiny amount of money in the trading account.
How many lots shall you trade?
Let's talk about CME products like NQ, ES, YM ....
Is the maximum lot you can trade 1 lot? 2 lots? 5 lots? 10 lots?
Well. it depends on your trade plan.
If your trade plan says max is 5 lots, then don't go beyond 5 lots!
If your emotional control is horrific
whether leverage is high or zero,
you are going to exceed the 5 lots limit.
You simply can't cure the emotional control problem
with low leverage.
If your emotional control is horrific,
don't ever ever trade until you have fix your
emotional control problem.
So the problem is not the high leverage problem,
but the inability to neutralize your negative emotions.