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Trader is a noun, a name for a person who buys and sells a commodity. So, if you use real money and buy and sell money with the goal of profiting from your endeavor then you are a trader.
New Trader, Experienced Trader, Inexperienced Trader, Profitable Trader, Loosing Trader, Bankrupt Trader, Swing Trader, Day Trader.... notice the pattern? By adding a verb we say something about the subject... The Trader.
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& From Wikedpedia
In finance, a trader is someone who buys and sells financial instruments such as stocks, bonds and derivatives. Traders are professionals, casual investors or speculators in financial instruments traded in the stock markets, derivatives markets and commodity markets, comprising the stock exchanges, derivatives exchanges and the commodities exchanges.