Does anybody know which is the most reliable firm to trade foreign currency with? Or is there a particular trading platform/software to use which is better?

In America, any NATIONAL Bank should be able to help you.

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I was just fooling around with the practice forex for a couple of hours today and made around $5k profit.

The simulations frequently do not match real world conditions.

Quoting from a federal government website:
"Real-time is not real: when marketing trading systems, some promoters claim that their systems have performed successfully in "Real-time Trading." This means only that the system has been tested using a live data-feed, rather than being tested using historical market data.
Remember though that in real-time trading, no trades have actually been placed in the market. Performance results based on real-time trading are merely another form of hypothetical results, with the same limitations. "

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