I'm not saying they shouldn’t use it at all. Just keep it as low as possible. This will help them understand and know how to handle their trades without risking so much. I dealt with a limit of I:30 with my previous broker and even though my new one turnkey forex offers 1:100, I don't go beyond 1:50. I like having a certain degree of control over my trades and high risks can just mess that up man. And for a newbie, in particular, a huge loss could be really disheartening.