If you want to compete with the large players you should have at least $50,000 US in your trading account if you plan on trading standard lots which are 100,000 units of currency.
There is a steep learning curve in Forex (and any market trading)
that is cruel to those people who are not experienced.
Even with a "proven" trading strategy it is still very easy to lose money based on emotions.
It is recommended that you trade a demo account for at least a year until you have a proven track record over time of success.
Once you have spent a year successfully on a demo account consider opening a mini lot account which allows you to trade 10,000 units of currency.
With an account trading lot sizes like this you can safely open a $5000 account which hopefully if you lose it all won`t break you.
If you have the money,
and are successful with the mini lot trading only then should you consider moving up to standard lot trading.
you will you blow out several accounts and a lot of money before you ever make it even if you do make it.
Read traders forums and you will see there are 100`s of failures for every one success.