Helo which broker has the most easy going margin requirements that they let you put in the minmum to make a trade and if you get a margin call you can add more cash ?
I use Oanda and they let you go up to 50:1, and you can add money as the position worsens. However, it is a moronic idea to use 50:1 or more. But that is a totally different discussion.
It can be done at Tenkofx. Margin call is 30%, and when I am about to hit, I put in more money instantly.
Low margins are a result of high leverage. Fxview, ameritrade and XTB offer good margins, and offer high leverage, up to 500X to its customers.