This is very common question of all new trader how much investment good for them I only say as a newbie you are less experienced and it is very risky to you to go with big capital my advice is that start with low capital and also with low leverage and put your trading with low lot size when time passed and you have sufficient knowledge and experience expand it accorgding to your beliefs but for newbie I recommend 100$ as a starting capital amount and future you can decide how much capital is right for you