Just simple from me, I think, there is no amount needed before you start trading, but, you have to start with an amount that will allow you to make a profit and cover trading costs.
Yes.There is no required amount in trading but as what most people say the bigger the amount of trading,the higher the profit you will get.But it all depends on the strategy you are going to use.If you are really smart,you can make profit even with a small amount.I suggest to start trading with an amount you can afford to lose.
I have seen many people losing who investing high amounts in trading with out any experience and also i have seen many people who invested with less and gradually build up by getting profits in trades just because they learnt it well.