Rabin , the different banks have their own requirements to get a credit card, you could also wire the money to your broker , the three brokers that i use to trade all accept wire or credit card, just be sure you are not borrowing to trade because that would not be a smart thing to do, also make sure you have mastered money management before you take the plunge,otherwise i wish you all thwe best.
"Individuals who cannot master their emotions are ill-suited to profit from the investment process."
Benjamin Graham