Obtaining funds for your trades and to create a working buffer you can use a credit card to both directly fund your foreign exchange activities and also as an emergency fund. But you do not want to just get any credit card, you will want a card to use specifically for trading and you want the best deal which can be found on any credit card comparison site.
The deals on credit cards are not as good as they were, since the downturn in the economy the financial institutions have been less generous with the deals that they offer on credit cards.
You can however try the comparison sites which will have the current best deals and it makes it easy to compare the interest charges and any interest free periods. With cards that offer a zero percent balance transfer for 12 months or more you can shift your debt from card to card to take advantage of the interest free periods.
I would recommend using a separate card to fund your Forex trading. The reason for this is that you can more easily keep track of your transactions and know how much credit you have or how much money is related to your trading activities.
Also with using credit you are not actually using your own money and if you clear the balance before the interest charges are added it will not cost you any extra. A card also provides a useful source of emergency funds should you need to cover the cost of a trade that you may not have the cash to cover yourself.